I think oversized sweaters are cute on a girl with shorts but I am a girl thinking this. Do guys think it is cute too? Or do guys like tight sweaters more that hug the body? Or both are good on a girl? :P
I don't like it when I see a girl wearing a big oversized sweater. I think it looks stupid. Sweaters that are more fitting look much better. It doesn't have to be tight, but at least it should fit you somewhat properly.
Probably not since guys basically just want to see your curves and your body, and oversized sweaters won't exactly accentuate your curves. But if you feel cute in oversized sweaters (which I do too, oversized long sweaters with tights underneath is the bomb) wear them anyway. :D
I think they like both: tight sweaters are tight (duh) and lots of oversize sweaters are thin enough that they actually show your form pretty well, and they usually have huge necklines that can show some cleavage if you have it. But boxy sweaters look good on no one. No one.