I'd definitely be inclined to agree with you re: music and sound effects. But, this is another thing that I think I'm a bit of an outlier on, and consistently get critiqued for not including. Music would ultimately be a pretty minor thing to add, with me selecting a few royalty-free tracks to play during light/dark/neutral scenes. Maybe a few special songs for select moments.
I'll look at it! I will say, my only thought regarding Guy's nipples, has been that his are on the large-ish side. It's not something I notice all the time, but every now and then I give them a second glance.