Obviously adding sex in anywhere is a good choice, but to more seriously address this question:
*Rent/buy some of his fav movies, get pizza, make a night of watching them
*Go see a movie he wants to see
*Play a fun LAN game together that is also easy for you to get into; Quake 3/4, Half Life 2, maybe Counter Strike
Really all you have to do is show interest in what he likes somehow. My gf tries to tolerate some of my geekiness, but with like games or most sci-fi movies she just doesn't have the attention span; same goes for if I start talking about something remotely technical or involved. Its not that she wouldn't understand it, its that its too boring to her. If my gf actively showed an interest in stuff that I like and maybe didn't scorn me everytime I loaded up a game, I'd be hella happy :thumbsup: