Just started an ice/storm controller a few days ago, and I have to say i'm loving it. Perhaps the most fun character i have yet used - despite the really weak damage output... Though i always look to group anyway so i don't mind.
If you're in the hollows you can amuse yourself by throwing the large groups off the cliffs with gale, and it comes in handy for pushing things back from the melee line (quickly followed by the mass immobilize power so they stay back) to keep your tank/scrappers from getting pummeled.
