I'm one of those nut cases that go the other way on rod selection.
I fish for fun, not meat, so I usually pick a very light rod for the conditions I expect to face. Not much excitement in dragging in a 10" bluegill on a 5 or 6wt, but on a 2wt it isn't always easy.
Bass (LM or SM) with my 8wt would be the smart choice, but I'd probably use my 6wt just for the fun of it.
On the other hand I bought an 11' switch rod this summer that turned out to be heavier than I anticipated (throws an 8/9wt switch line or a 10 or 11wt WF line well) that I will use in the big river (the Ohio) this winter simply because I can cast huge flies long distances with it and I'm sure I'll be bragging if I can hook anything over 5 pounds.