I only use the granny ring once. And that was on a long climb with my little 3yo daughter in the rear seat. This is with my commuter/touring bike 48/38/28. With my roadbike that has a standard 52/39 I climbed the same hill with ease. Unless you have some steep hills or knee problems, a standard double is all you need.
On the other hand, the compact is simpler, lighter and just plain looks better.
A standard double is plain bad ass on a road bike. Period.