I'm 29 and have always liked the Stones but never really KNEW just how awesome they were until my wife got me into them. I've always been into the Chili Peppers and other bands from the 90s, like most guys my age.
For her b-day this year (her 25th), I got her every album the Stones ever made and we've been listening to them nonstop ever since.
They are now my favorite band. Funny how that can happen.