Hearthpwn

Recruit stuff worsens the consistency of your deck since you can draw the minions you want to recruit before you can recruit them and end up with a dead hand. Also, if you plan to recruit Big minions the rest of your deck has to be spells (or in Hunter's case not-beasts or in Big druid case not-1-2-3 attack minions) which is a downside.

Prince doesn't allow you to play any other 2 drops and you need to draw him to use him, so again, consistency goes down. In standard it may not seem like a downside but in wild there's so many good 2 cost cards that prince isn't as good. So it depends on the amount of good 2 mana cards.

Cube/deathrattle is a weird one since on paper it should lose you a bit of tempo to gain you a bit of value but in practice it doesn't work that way. The only real downside is that you need something on the board already that you want to copy, otherwise it's just vanilla 4/6.

And with mana cheating it depends how do you cheat, if it's like Aviana-Kun then I guess it is pretty unfair (because you can search the parts, kill opponent in 1 turn fairly consistently and gain bodies on top of that) but if it's like Gather a party for lich king or something then it's fair for me.

But well, the only deck I truly hate to play against is burn mage/aluneth mage with ice blocks so maybe my views are biased.

They are too powerful to be in classic set imo

Yea warlock has access to pretty good aoe removal options. But none of them are op, the closest of them that could be called that would be defile.

Judging by hsreplay stats priest seems the best

So when do you prefer to do your combo, as soon as you can or after you emptied most of your deck?

I added it mostly for it's stats, there really aren't that many good 2 or 3 mana mech-cards. Other options include Annoy-o-Tron and Micro Machine . You could also add more 3 drops instead of it, like Nightmare Amalgam and Tinkertown Technician

Pretty much only Flobbidinous Floop

I'm not sure about UI in this kind of deck. While you'll be able to resolve 1 UI in a game without a problem the second one could be really troublesome, especially if it stays in your hand up to fatigue since then you could just kill yourself by fatigue with it. Also, you can't just leave it be because cthun requires empty hand.

Because Foe Reaper with rush from Hero Boom is an AoE of sorts, I'd rather take it than Dr. Boom. But you would probably be fine with Dr instead of it.

To me they are mostly there for quests and other events, if I want to talk to someone I do it elsewhere. I prefer to have larger list just so I can do spectate/duel quests without waiting for someone to come.

You can run both if you like, for consistency and additional combos. But since you will be able to do combos with floop maybe you could live without having twig in maly in standard.

coin with mana wyrm on board is pretty funny way to win that one too

A lot of things... The most "purely for fun" one that I remember was crafting Nexus-Champion Saraad. Even though I like the card he is just a rng slot machine.

You could also try Vol'jin, he'd serve as a tempo/removal of some sorts that doesn't worsen spiteful/archivist pulls. He would be worse than silence/entomb against Voidlord if you are looking for lethal but otherwise it could be solid.

Amazing golden animation!