You speak as a BH healer, have you tried the dps aspect? I really think I'll like the BH but I find the fact of tracer missile spam being mentioned all the time a gigantic turnoff, I don't like simplicity, I live for complex rotations with tons of buttons and shiny things to push.
As for the assassin/sorcerer, I am planning on playing an assassin as my second character when my friend decides to join and im going to roll it as a tank. It looks like a really fun class, not to mention I love the glow sticks