Still, on 'Friends', we had some guest-stars who were less than spectacular, not the stunt-casting, but just regular guest-stars, and they weren't particularly great actors, but the material was so good that they scored. It's the writing.
I've grown tremendously as an actor by being there. It is comic writing the likes of which I don't know that I'll ever see again and it's been a great, great experience.
And if you have great writing, it's really easy, but if it's not so great and you have to work a little harder, I could tell where the work needed to be done but comedy is just fun.