I agree that it just takes time for bangs that have been straightened for a long time to re-discover their own curl. If you used to blow-dry all of your hair straight, remember how long it took for the rest of your curls to re-emerge? Give your bangs a little time and little more pampering and an extra little boost of curl product, and they'll come around.
Money might not buy happiness, but it will buy a shiny red Mustang and you can drive up REAL close to it.