For my part, I'd love to see a battlemage type class, wielding both weapons and magic with some skill. Though perhaps this is too similar in concept to WoW's death knight it's something I inevitably try to do with paladins, playing them with a holy "shockadin" style spec. (It should be noted that this playstyle was somewhat less ridiculous before Cataclsym class changes... but it was still less than ideal. Not that it stopped me.) But tell me, fellow gamers: what's the class type you most want to see in WoW?