Sebazy sorta hit the nail on the head. With WHM, you can brute force through a lot of situations, and even recover from some really deep deficits. That feels good. With AST, you can Lightspeed for a modest recovery, and stack a bunch of abilities under a CO extension, drop EA precisely, and pray for good cards, but I must be missing the part that makes the class fun. However, I need to be AST for my static, since our other healer is a better WHM than I am.

I realize this is entirely subjective, which is why I was asking for tips, suggestions, personal playstyles, and things people like about AST.