I just like his fury the most, since I can take out the most zombies with him without acquiring damage.
& I hit all the Acheivements finally! & I just have 3 more challenges--running over zombies (halfway through lvl 4), healing co-op players, and playing multiplayer.
you got the rage challenge? thats the killer for me, i still have to rage like 8000 more zombies, i thought it was only like 700 but thats just to get to 4/4 . i also have the running over zombies one but that can be done. i just never used rage