Rock Band has one of the greatest soundtracks in gaming history... the collection of songs is so broad and covers mant eras and styles. I'm finding it very hard to pick, but I would have to say that my top 5, in no order is:

Epic
Black Hole Sun
Welcome Home
Hysteria
Dani California

How about you?

not got rockband 1 sadly >.> i wants though

however the downloadables are covered in RB1 + RB2.... soooo

indestructable = pwnage
Inside the fire
And justice for all....

some other ****s too but those are my faves on the download tracks...

if i could get a hold of the RB1 tracks... (which i desperatly want to)
Enter sandman and black hole sun would be must plays.

Rock Band 1

1. Creep
2. Welcome Home
3. Highway Star
4. Epic
5. Here it goes Again

Rock Band 2

1. Chop Suey
2. A Jagged Gorgeous Winter
3. Almost Easy
4. Everlong
5. Message in a Bottle DLC

RB

1. Enter Sandman
2. Learn To Fly
3. Black Hole Sun
4. Dani California
5. Epic

RB2

1. Master Exploder
2. Give It All
3. Chop Suey
4. Drain You
5. Down With The Sickness

they have chop suey in RB2? sweet

RB2: (I dont have RB)

Chop Suey
Snow (Hey Oh) [DLC]
Down with the Sickness
Almost Easy
Inside the Fire [DLC]

I only got Rock Band 2 -_- So here are my Top 5 RB2 Favez in no order whatsoever:

Master Exploder (TENACIOUS D FTW!)
Chop Suey
Down With The Sickness
Painkiller
Battery

...whatever, I'll throw one more in there:

Let There Be Rock

If I had Wii Points, however, Inside The Fire and ...And Justice For All would be on there.