I act feminine sometimes (my music and movie style is somewhat feminine, but I also watch a lot of guy movies and listen to a lot of guy music), but those are the only ways that I act feminine. Is this normal for bisexual guys?
There is no normal way for bisexual people to act. Being bisexual or gay doesn't change your movie and music preferences. Everyone likes different things and acts different ways regardless of sexuality.
I don't think movies and music are necessarily gendered. I also don't think, if they are, that liking them means much of anything. Some guys are just naturally more feminine or masculine than others. A friend of mine (straight guy) likes films that typically only women like (at least in the US). It's just a taste. So, yes, I'd say it's normal.