I'm a recent college grad, just moved to Brookline from Amherst, MA. I'm a huge music nerd - I sing and play violin, among other things. I also looove to cook/bake, do outdoorsy things, and just generally have a good time!
Boston is awesome. Stop sitting on your couch and get out and enjoy it. 20's and 30's aged people --- come on out for a bunch of fun events. Anything from happy hours, to hikes, to sporting events, to concerts, to coffee... anything awesome.