I like it rough.
It certainly doesn't have to last for three hours everytime, but once in a while it's nice to spend an entire morning in bed going at it.
I'm all about quality time, though, sometimes a three minute quickie can be just as hot and satisfying as a longer session.
And I usually have at least two orgasms during a basic 15-20 minute session - and often several more than that. It wasn't always this way, though - I'm in my prime.