Ideas for 15 year old boyfriend birthday present?

So, we've been together for almost a year and 6 months. his birthday is coming up and, i know i should be able to know what to get him, but sadly, i don't. he's really in to his Xbox 360, he's not sporty...at all really. He likes to joke around, and he has a TON of movies, doesn't really care about his wardrobe, he has sooo many video games i don't really want to get him anymore! Pleas help me!