A friend of mine got me into the Polysics. I'm an old Devo fan so they amuse me.
He also tried to get me into Hello Project. I kinda had to draw the line there. The music is catchy and the girls are C-UTE but watching a hundred thousand 40 year old wota dancing IN PERFECT SYNCH with the girls I had to go hide.
Some things are just too creepy- even for me...
Boom Boom Satellites are pretty good, though I haven't heard that much more than whats on the Appleseed soundtrack.
In animation, I'll have to go with Yoko Kanno- she's just so damned versatile.