I love J-Rock! The Pillows being one of my favs, because I've got most of thier music and they were on one of my favorite series (FLCL).
I like a lot of different bands. Do any of you like Bump of Chicken? I really like the cover they did for "Hybrid Rainbow". It's pretty relaxing. Dir en Grey rocks my friggin' socks off! I listen to them when I'm playin' games and riding the bus to work.
There's also Asian Kung-Fu Generation! OMG, they are great! I think that them and The Pillows would have to be my two favorite bands. ^_^