Nothing says sexy male quite like a nice fitted waist coat. Or at least not in my world ^_^. I'm relatively large chested, but if I wear a dark colored waistcoat or one with lots of distracting detail over the chest I feel very manly indeed, and it also helps you pass. People who see me just in passing, suited up, have way more of a tendency to call me 'sir' than when i'm in my hoodies.
A few years ago I had a thing for plaid shirts, the trick I used to hide my chest was, wear a t-shirt, put on your plaid shirt, button the third button from the top only. This hides the 'under breast line' and also hides any curves in your hip/waist that might give you away. I wouldn't worry about your arms at all. I know lots of guys who don't have hair, I actually find less body hair more attractive in a man, personally. Roll up your sleeves and show off those manly muscles. If you roll them up, you can always roll them back down.
However I still strongly believe that you should go and buy a nice waistcoat, tie and button up shirt, every man should dress like he still lives in the Victorian age in my world
Depending on the shirt, you can sometimes flare the cuff too, which can look appealing.
The best way to find yourself some new clothes? Stalk into a store (one like American Eagle is good, they have a clause that states they must treat trans individuals respectfully, if I remember correctly, Maxx also has that statement), and do one of two things
1. either walk over the the guys section, load up and head off to the change room, or
2. Find someone (this is a bit of a stereotype and I apologize... ) whose either between 20-30 or 50+ (as they tend to be very accepting of our situation) and either tell them, "hey i'm trans, I need you darling to make me into a manly beast" (don't use those words
) or the good old stand-by "I'm an actor and I'm being cast as a man in an upcoming play, can you help me out?" Getting the help of someone else can be very helpful, their an outside eye that's going to tell you what works and what doesn't. My first pants outing I used the actor line and the girl showed me the mens jeans sections and told me a bit about sizing and stuff, jeans aren't really rocket science so I took it from there
but it granted me un-harrassed access to the mens section. Just a weird side thing but I always buy 'fancy boxer briefs' at American eagle, usually at the last minute in a kind of 'pft what are these?' kind of way, i've never once been harassed by the cashier. No attitude, no care just good customer service.
For sizing, a lot of 'hipster' guys seem to be small... iif you can find a hipster store you might be able to find mens clothes that will fit you a bit better. I find plaid shirts tend to either fit really small or really big o_O
