I am currently trying to motivate myself to train for a triathlon. It's really not as much work as you might think. Other hobbies include, hiking, biking, the outdoors in general, reading, and movies. I'm also motivating myself to go to grad school. Eventually I'd like to start a non-profit organization, but my aspirations change almost daily. Basically, I like to play, but I'm also ready to be a grown-up.
My taste in music changes frequently as well. A few of my current favorites inlcude: The Beatles, Ben Kweller, Black Star, Bob Dylan, The Clash, Frank Sinatra, Iron & Wine, Jeff Buckley, Johnny Cash, Morrissey, The Mountain Goats, Neil Young, Neutral Milk Hotel, Patti Smith, The Pogues, Portastatic, R.E.M., Radiohead, Squeeze, and Willie Nelson.
I suppose first date ideas depend on the people going on the date. I tend to shy away from the standard "dinner and a movie" because it's overdone and movies don't offer too much opportunity for conversation. So, I'd rather do something active like going for a walk somewhere neither of us has been to explore, or volunteering together. Even garage sale shopping or ending up in a toy store are possibilities. Of course, it takes two people to go on a date, and I'm open to ideas.