I’d definitely be turned off if a Master had stereotypical attire on and seemed like he was trying too hard to look the part. As the others have said, what’s important is his personality and how he handles himself. The "Secretary" example Silke gave was a good one.

But for my personal preference, I probably wouldn’t be too attracted to a Master wearing polo shirts or whatever. How you choose to present yourself is also important.

And… while it's not the most important thing... it never hurts if you look like a Greek god too