I've always wanted to have the power to control time. Though unfortunately, it's not for superhero-like reasons, but for my own gain. Could you imagine, going into a bank and waiting for some staff to open the door to behind the counters. You could just freeze time, walk right in and take all the money in the registers! The same with supermarkets. You could get a trolley load of stuff, freeze time, walk right out of the shop with it and by the time you've unfreezed time, nobody would be any the wiser that you'd taken anything.
Or for more convenient purposes. Say you're late for a train and you've just missed it. Simply re-wind time and get on the train as intended. Or perhaps you didn't get much sleep the night before and when the alarm goes off next to your bed, you simply freeze time, sleep in for as long as you want and then when you wake again, it'll still only be 7.30 in the morning!
The possibilities are endless.