This is my personal twist on Midrange Hunter. It keeps 2x of what I consider to be the core cards, but plays many one-of tech cards and a unique lineup of secrets. It plays a tracking to dig for those crucial cards when you need them.
Decklist
2x Webspinner
2x Haunted Creeper
2x Knife Juggler
2x Mad Scientist
1x Ironbeak Owl
2x Animal Companion
2x Houndmaster
2x Piloted Shredder
1x Cult Master
1x Loatheb
2x Savannah Highmane
1x Tracking
1x Flare
1x Quick Shot
1x Bear Trap
1x Snake Trap
1x Snipe
2x Eaglehorn Bow
2x Kill Command
1x Unleash the Hounds
2x Haunted Creeper
2x Knife Juggler
2x Mad Scientist
1x Ironbeak Owl
2x Animal Companion
2x Houndmaster
2x Piloted Shredder
1x Cult Master
1x Loatheb
2x Savannah Highmane
1x Tracking
1x Flare
1x Quick Shot
1x Bear Trap
1x Snake Trap
1x Snipe
2x Eaglehorn Bow
2x Kill Command
1x Unleash the Hounds
Tech
Flare
This card can singlehandedly win a match against secret Paladin, and is quite good against almost any Hunter or Mage deck.
Ironbeak Owl
Silence for pesky taunts, Shredders, overbuffed minions, whatever. Always nice to have a silence somewhere in your deck. Plus this one is a beast.
Unleash The Hounds
Amazing against Paladin (Muster, hero power) and is amazing whenever your opponent has a wide board, like after Patron combos but doesn't kill.
Loatheb
Great against control when you expect a board wipe of any sort. It's a good play on any turn against Tempo Mage, Oil Rogue, or Mally decks.
This card can singlehandedly win a match against secret Paladin, and is quite good against almost any Hunter or Mage deck.
Ironbeak Owl
Silence for pesky taunts, Shredders, overbuffed minions, whatever. Always nice to have a silence somewhere in your deck. Plus this one is a beast.
Unleash The Hounds
Amazing against Paladin (Muster, hero power) and is amazing whenever your opponent has a wide board, like after Patron combos but doesn't kill.
Loatheb
Great against control when you expect a board wipe of any sort. It's a good play on any turn against Tempo Mage, Oil Rogue, or Mally decks.
Secrets
General
Not running multiple traps makes draws much smoother as you'll never have a dead trap or Scientist.
Snake
Amazing synergy with the deck. Is great when you have a Juggler out, and an amazing secret to have proc'd the turn before Animal Companion or Cult Master.
Snipe
People don't play around this, and it can snipe some pretty game changing targets such as Grim Patron. Dealing with a three or four drop with your Scientist while possibly also trading for a two drop is such insane value, and people generally have already played their Webspinners, Haunted Creepers, Shielded Minibots, and such before this secret comes out.
Bear
Good against aggro decks, can stifle lethal combos because your opponent might attack with their lower damage creature first expecting Freezing Trap, and gives you a beast for your Houndmaster to buff. It is also a taunt which means they are forced to proc your Snake Trap or use removal on it.
Freezing
While Freezing is amazing tempo and is really good against deathrattle value creatures like Haunted Creeper, it can also pop too easily on tokens and has antisynergy with Snake Trap combos. It could be a meta consideration over Bear Trap though.
Explosive Trap
Not great when proc'd on weapons and bad in quite a few matchups. The deck is already quite good against aggro with Creepers, Scientists, and Unleash.
Not running multiple traps makes draws much smoother as you'll never have a dead trap or Scientist.
Snake
Amazing synergy with the deck. Is great when you have a Juggler out, and an amazing secret to have proc'd the turn before Animal Companion or Cult Master.
Snipe
People don't play around this, and it can snipe some pretty game changing targets such as Grim Patron. Dealing with a three or four drop with your Scientist while possibly also trading for a two drop is such insane value, and people generally have already played their Webspinners, Haunted Creepers, Shielded Minibots, and such before this secret comes out.
Bear
Good against aggro decks, can stifle lethal combos because your opponent might attack with their lower damage creature first expecting Freezing Trap, and gives you a beast for your Houndmaster to buff. It is also a taunt which means they are forced to proc your Snake Trap or use removal on it.
Freezing
While Freezing is amazing tempo and is really good against deathrattle value creatures like Haunted Creeper, it can also pop too easily on tokens and has antisynergy with Snake Trap combos. It could be a meta consideration over Bear Trap though.
Explosive Trap
Not great when proc'd on weapons and bad in quite a few matchups. The deck is already quite good against aggro with Creepers, Scientists, and Unleash.
Mulligans
Webspinner
Keep against aggressive decks where you can expect to get value. The best classes to keep it against in the current meta are Hunter and Paladin.
Flare
Keep it against Paladin. Keep it against Hunter and Mage if you already have a reasonable hand.
Quickshot and Eaglehorn Bow
Eaglehorn Bow is solid against many decks, but you really want these when there is a 3hp minion that you need to deal with such as Aspirant or Mechwarper. I would definitely try to get one of these cards against Druid.
Haunted Creeper
Good two drop in most cases. Might want to mulligan it vs Warrior though, as they likely have a way to easily wipe up the tokens.
Mad Scientist
Almost always a good keep, but especially good against decks that you expect to play 3/2s like Juggler, and heavy removal decks.
Ironbeak Owl
You can keep this vs something like Priest if you already have a solid hand.
Knife Juggler
Good against Paladin, Hunter, and decks with light removal.
Animal Companion
If you have a two drop already then this is solid to keep, especially against warrior as they'll take a lot of damage trying to kill it with a weapon.
Unleash the Hounds
Fine to keep against Paladin if you have a good hand already.
Piloted Shredder
It's perfectly fine to keep this vs Warrior.
Keep against aggressive decks where you can expect to get value. The best classes to keep it against in the current meta are Hunter and Paladin.
Flare
Keep it against Paladin. Keep it against Hunter and Mage if you already have a reasonable hand.
Quickshot and Eaglehorn Bow
Eaglehorn Bow is solid against many decks, but you really want these when there is a 3hp minion that you need to deal with such as Aspirant or Mechwarper. I would definitely try to get one of these cards against Druid.
Haunted Creeper
Good two drop in most cases. Might want to mulligan it vs Warrior though, as they likely have a way to easily wipe up the tokens.
Mad Scientist
Almost always a good keep, but especially good against decks that you expect to play 3/2s like Juggler, and heavy removal decks.
Ironbeak Owl
You can keep this vs something like Priest if you already have a solid hand.
Knife Juggler
Good against Paladin, Hunter, and decks with light removal.
Animal Companion
If you have a two drop already then this is solid to keep, especially against warrior as they'll take a lot of damage trying to kill it with a weapon.
Unleash the Hounds
Fine to keep against Paladin if you have a good hand already.
Piloted Shredder
It's perfectly fine to keep this vs Warrior.