In my opinion, the all-black has to go. It just screams "STOCK!!!" Definitely get some custom paint on there, I don't know what your style is but please don't keep the black.
Aside from that, everything's fair game depending on your style. You could swap the hardware if you want, I know I'd change the bridge that one looks pretty cheap. Then of course you could go into electronics, but I don't think that's what your asking about.
Ummmm aside from the paint and the bridge, I don't have any other advice just whatever you think looks good man.
You go outside and practice screaming. We'll play music while you're gone.