/ic/ - Artwork/Critique

Anyone know a good way to continue practicing when you're bored and frustrated with hammering down fundamentals all the time?

I was thinking I'd stop drawing naked people and fruit for five fucking minutes and just practice my sense of linear perspective by drawing screen shots from movies that I like.

I'm not trying to be a lazy cunt. I've literally have drawn nothing but nudes, geometric shapes and still lives of mundane household objects for the past month in a half and while I've improved massively, I just need to do something different today.
tl;dr is having fun allowed?