For me, it has to be comfortable. At home, I simply wear a fleece plaid around tight around the waist, which is nice because it shows puts stress on both my hips and shoulders, and make my waist look really tiny as a result.
But in the real world: It's baggy t-shirts, cargo pants, hiking/mountain boots, sports socks, full zipper vests (sleeves ALLWAYS rolled up) and never boxers. (I often have to walk or cycle, sometimes even hours on end... Chafing really isn't pleasant, especially when the socks get stuck between the sadle and leg..)
Sports-boxers aren't an option, because, ironically, my upper legs are quite muscled. A sports-boxer that fits around those won't fit around my waist, and.. Well, you catch the drift.
So.. It's all baggy, for me. Might not be pretty, and I'd really like some pretty clothing, but... Well, clothing is expensive, and I have to take a pick: Either pretty, or comfortable. Either fragile or strong.
Allthough I do favour women's long sleeve t-shirts. They fit nicely around the shoulders, over the stomach and stress the... Let's call them 'chest muscles.'