Join the crowd man...I do a mishmash of stuff. I also wouldn't trade the quirky ideas I have for anything. Since I only do this for fun, it's a blast to hear a cool Death Metal song, and do something like that, then a straight up 3 chord rocker. Then a nasty, punky cover. I would personally not try and stick into one genre of music. I've done a sort of rap/Hip Hop tune, just because I have some samples to play with, and I had lyrics doing nothing.
Just have fun with whatever strikes you.