Jrock/Jpop - In my opinion jrock > jpop. But some consider them the same. I don't. =\ But I like bands like Pierrot, Asian Kung-Fu Generation, and The Pillows. I like artists like Utada Hikaru (we have the same birthday, 1/19 :D) and Gackt.
Rock - I like a few songs of modern rock, but I always forget the names of the artists/bands. But I love bands from the past. The Beatles, REM, and Aerosmith pwn.