These are a few songs that are SEVERELY lacking from RB
Dream Theater is great, as they're one of the few good rock (Progrock) bands that use the keyboard. No offence, but me and my brother are tired of playing a lot of the songs you guys put in RB3 and pretty much came into the conclusion that they're just fillers for the keyboard.
Forsaken - Dream Theater
The Dark Eternal Night - Dream Theater
Some Jrock would be nice too.
Redemption - Gackt
Moonlight - L'Arc-En-Ciel
Driver's High - L'Arc-En-Ciel
Though Foreign, several people know Mago De Oz.
La Conquista - Mago De Oz
Molinos De Viento - Mago De Oz
Fiesta Pagana - Mago De Oz
There are several more, but these are the ones I wanted to point out.