Oval face is a universal shape that can pull off any kind of bangs.
For square faces perfect choices are side swept bangs, angled bangs, avoid blunt bangs.
Round faces look good with textured side bangs, angled bangs, straight across bangs.
If you have an oblong or rectangle face, go for side swept bangs, layered bangs, full fluffy bangs, avoid mini bangs.
Diamond and heart face shapes look great with side swept bangs or short angled textured bangs.