Your interests really shouldn't change much to be honest. What's the point of being a girl if you can't do the things you love.
As for my hobbies, I draw and draw and draw haha
I surprisingly play a lot of video games mainly ranging from rpgs to fighters (and like pretty a lot of people League of Legends). HATE FPS which is what a lot of my friends love.

( I love creativity so I tend to pick up very small hobbies like playing music, singing, writing poetry..
I have always love emotional movies, so called "chick" flicks, mystery & suspense, and love dialogue movies. I love japanese dramas that make you cry.. SO I love crying ahha After transitioning the only thing that sort of change was how long I can play games until I am bored..
Well I always wanted to one day wear beautiful clothing.. So thats a new hobby of mine
I am majoring in multimedia design which was kind of lame.. Wish I did something more geeky or sciency.
I don't have many "male" activities... which to me is more like heavy cleaning, building stuff, body building, etc.. Since they require lots of muscle training, being dirty which I kinda flop at XD Not saying they are male activities. Since women can love muscles themselves and be really strong, but yeah yours aren't really what I would say "male" stuff. Even if they were than that's all you and if you love it then that's all that matter honestly.