I vowed I wouldn't be a healer in ARR (healed in both XI and WoW) but found myself seduced by SCH. WHM is fun too, but I don't play it as much, mainly because I like to deeps and find it much harder to manage MP on WHM. Haven't tried AST at all except to unlock it so can't comment. I do intend to level both AST and WHM to 60 tho. So I guess the vow not to be healer didn't work out for me XD. I know folk think healers have a stressful time, but I find it much less stressful than being a DPS (I worry too much that my numbers don't add up, healing I can tell if I'm doing a s**t job because people are lying on the floor!)