Surprisingly I like a 9' rod with a 5 weight reel/line. That's been the setup I've had the most success with even on small streams. According to the books I guess I could be using a 2/3 or 4 weight set up but I'm not. At least for the time being.
I just bought a Three Forks 8' from Cabela's and am wondering how it will be to cast with a shorter rod this coming summer. It's a 5 weight and will be paired with a reel of the same weight. in the scheme of things six to twelve inches may not be much but we'll see if I can catch any fish.
Good question. It will be interesting to read the responses.
"I often do not start fishing until the cool of the evening..."
Norman Maclean: A River Runs Through It