Didn't we have a thread similar to this..? Mneh, I'll answer anyway.

Personally I prefer broader men- not really overweight men, and not really muscly men either (yuck). Just... I like broader/taller guys. It's true that while most men would prefer a curvier woman as opposed to a thin one, I think most girls like slim guys. God, how fucked are our perceptions? Women think men want them to be skinny and men think women want them to be muscly >.<

As for what looks good... I think you just have to subtly cover up the areas of your body you're self-conscious about, and gracefully draw attention to your best points e.g. I hate my arms the most because they're rather short and podgy, so I cover them up a lot, and I hate my nose but I want to bring out my eyes so I have a very thick black fringe/bangs that contrast with the green in my eyes. (Ironically, I also have a nose piercing... there goes my theory, ha). But I think the same goes for men. Like if you're top heavy, don't roll up your sleeves, bulk out your bottom, and vice versa.