I think big bowls are OK sometimes, but the can lead to a lot of wasted tobacco since on some it can be tough to get to the bottom of the bowl.
Cobs are good for short smokes. I have heard good things about the Baby Bents at Pipes and Cigars:
http://store.pipesandcigars.com/babybentpipes.html
I have a few pipes with small bowls that are great for a 15-20 minute smoke. One is a Peterson, a small Boswell and couple of others are basket pipes. One of the backet pipes, a small Bulldog, is actually an exceptional smoker.