Young ones will ALWAYS drink and hookup.
Stick around here a while and you'll be a believer...
My own personal thoughts are that it isnt worth seeing europe if you kind of fly through everything and it all blurs together. Maybe pick a city (Munich, Barcelona, A-dam, London, Paris..?) or a general region (valencia, bordeaux, Tuscany?) and spend your time there, kind of getting to know the place...
I can't wait to get to Edinburgh, myself, this spring when I'm based in london. Home of J.K. Rowling and also a bit of a literary capital. Somebody was telling me the other day that there is a really neat sort of pagan ritual thing in Feb... hope I can make it. And of course you've heard of Fringe Fest in August?