That's good. I don't play the drums nearly enough so I should be doing that when I'm bummed out. Unfortunately if I play badly, that puts me in a worse mood.
naw you just have to have fun with it and play what you feel. being serious takes the fun out of playing, it shouldn't have to feel like a job. but still don't give up on it, working hard on something don't mean seriousness has to be involved.