I've noticed that a lot of people here aren't really big fans of mainstream bands. But if you like any, who are they? Try to keep it to recent (90's and up) because I know we all are fans of the Beatles.

I have about 3:

Nirvana (Yes non-existant I know)
Smashing Pumpkins (Also broken up)
Tool

I like radiohead and system of a down. Some of the non-mainstream music i like is: Opeth, skinny puppy, download, gridlock, autechre

One thing they all have in common is complexity.