Okay, my man boobs are pretty annoying for my height, and my arms are flabby since I haven't been working out in a while. Standard S sized shirts don't seem to help me in this area. All they do is emphasize my moobs. M sized shirts are too long and sometimes too big in the sleeves. But I guess I'm willing to take extra measures now. So, if I'm buying a shirt with alterations in mind, what should fit? Which parts are the hardest to alter and which are a breeze? That would help me with future sizing decisions. Thanks.