I have a gmail account and the lure was 1G of space - no need to trash anything! Ever!
How did I manage to already use up 5% of that gig of space? And that's without spam, which fortunately has been almost non-existent in my gmail accounts. How is it that I've already used 46MB of space? It's because I don't bother trashing anything. Exchange a few photos, swap a song or two and all of a sudden, that gig of space doesn't look so big anymore.
One more thing in my life that I need to unclutter.