How to share stuff I enjoy with my girlfriend?

I would like a way to convince my darling girlfriend to get experience some things I enjoy. We have great fun all the time of course, but it's always doing stuff she likes to do and recently whenever I bring up doing something I like I have noticed a rather disgusted look on her face. I'mma nerd, a very nerdy nerd. I like to play pokemon, Mortal Kombat, WoW.... stuff like that. I also enjoy doing random research on things I find cool. Like, thinking of a random animal and looking up it's habitat, mating habits, predators and prey. I'm also a huge fan of Marvel comics. But rather than doing anything of the sort we just put make up on(My attempts to explain to her that guys should not wear makeup fail epicly), color pictures of Tinker Bell, watch Jersey Shore(Which i totally HATE!), and let her pick at my zits and such. I don't mind doing these things, I'm cool with whatever makes her happy, her smiling is the most beautiful thing in the world to me. But it'd be nice if I could show her my stuff is fun too ya know?