It depends on the type of curl. Very tight curly hair wouldn't look so great with the contrast of straight bangs. Loose, more wavy type curls may look good with thick straight bangs.

I like these:

Straight Bangs with Curly Hair???-uploadfromtaptalk1348078311630.jpg

Straight Bangs with Curly Hair???-uploadfromtaptalk1348078321658.jpg

Sent from my SAMSUNG-SGH-I997 using CurlTalk App