craigb
So, over the last few years, I've been discovering lots of music I never knew about and am loving it! 
Me, I've kept tons of things for later.
Like, I've known Bowie forever, a few songs and albums, but it wasn't until a few years ago that I really got into it, and started buying the rest of the records and finding all those gems.
There are tons of artists and bands I know but have yet to give time to.
And if I ran out of things to discover, worst case, I could try and enjoy Rush or something... :P There's enough music in there to keep me busy for 10-12 years.