I agree with what you say about fashion. Yet there is a paradox here. I am fairly muscular (not huge but bigger than most) and i tend to get comments when i wear really well fitted T shirts. If i wore smart shirts my physique would lose a lot of its impact. Yes you could tell i work out still but a lot of the visual aspect would be lost with regards to my physique.
I always do better when my arms are on show, as stupid as that seems.
My point i suppose, is in my opinion (and experience) physique trumps fashion, as long as what you wear fits well and makes you feel comfortable.
This is a good point. I’ll be able to say for sure next year, as I’m currently embarking on four months of bulking. But my gut feeling is that it’s going to depend on your age and environment.
If you’re in your early 20′s, I think the muscles would go better for you. Also, if your main demographic is college-age girls, the T-shirt is probably going to be better as well (assuming you’ve got some good physique to show off).