I'd like them to be well designed and balanced. Skills that actually have synergy would be nice. I mean, they did it right with warrior then went in the complete opposite direction with DK. A class design that isn't completely homogeneous with another class would be good too (looking at you gun/bow mages), and lastly something fun, I'd like to avoid spending my entire time fishing for procs or managing fickle and multiple timers (mch and blm)