Whereas I like cruise control until I'm in a pack of cars on the interstate (nobody ever keeps the same speed unless they're following someone) or entering an area with tight curves (I don't feel safe letting the car speed around that curve, even if I would go faster when I'm on the gas - cruise control doesn't understand how to slow down going in and speed up on the way out). If I know such things are ahead of me, I'll tap the brake to put the cruise on standby, and put foot-on-metal until the worry is past.