One of four depending on the flies I'm throwing:
1) 8' 4wt rod, floating line and 5x leader. This is my all purpose go-to rig
2) 6'4" 4wt bamboo rod, floating line and 6x leader. This is my close quarters/short cast rod, usually I'll be fishing dries and soft hackles with this one.
3) 8' 6wt bamboo rod, floating line and 4x leader. If I'm throwing poppers or other bulky/weighted patterns, the bamboo gives me the sensitivity and control of a lighter rod while still having the power and castability of the 6wt. This is also the rig I'll go to when bass, white bass, etc. are also a possibility.
4) 8' 2wt. rod, floating line, 6x leader. This is the rod for the times when I know it's just going to be gills and/or small bass and when there's not a whole lot of cover a fish can get me tangled up in if it runs. The drawback here is that the light line holds me to pretty small flies.
Obviously different situations will mean tweaking the system just a bit. But these are the most common set-ups you'll find me using 99% of the time with the bamboos fast becoming favorites.
If it swims and eats, it'll eat a fly.