These games absolutely had a huge effect on my musical tastes, since I was playing them as a teenager. They got me into a classic rock phase, an indie rock phase, a metal phase, etc. And they introduced me to some of my current favorite bands like That Handsome Devil.
Really, I ended up liking the Bonus Tracks in early GH/RB games more than the main setlist. Great, underrated gems in there.
Weirdly enough, Rock Band Blitz ended up being my favorite in the series because I got too lazy to bring out all the instruments. I do miss the Face-Off competitive modes though.