As my father's wife says: [posh brit accent] "Bangs are the poor woman's face-lift."
Only she calls them "a fringe".
Despite that, I still don't like them myself. The only people who need bangs are people with unusually large foreheads - then it kinda balances everything out.
I once met a girl with bangs and I always wondered why she had such a heavy helping of them, until one day, I saw her walk out the shower with her hair up in a towel. She had (and I'm not exaggerating here) NO FOREHEAD. Her hairline started about a centimeter above her eyebrows. Freaky.
/bang stories.
But hey, if you like them, go for it. Especially if you have short hair, it won't be too bad to grow them into shorter layers, but leogirl is right - the grow out phase is a slut - especially if you have long hair.