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Assassin: Don't play one
Mage: Violet (Love the animations)
Fighter: Grimnir (Dwarves are cool!)
Tank: Galen (Mag is too OP)
Support: Ash (love the under dog)

I'd also have to say Mag. His so called nerf actually makes him stronger. I used to hate the knock back in most situations.

My two favorite are Winner animations. I love when Ash stands on top of his weapon. Equally comical is the squirrel on Galen's head. Nice little touches to a fun game.