I don't know if most Americans agree with me on this... but looking back, all the time I'd spend out with friends hunting around for beer was probably more fun than when we actually had it. Later, in school the age limit forced us to have house parties, which were always more crazy and fun than normal old bars.
I don't agree with raising it to 21 (I think voting, tobacco, alcohol, military service, etc. should all start at 19) but I see your point. Thwarting the law really was fun and house parties do beat the shit out of bars.