Re: Your favorite....
9' 5wt med/fast handles any trout up to about 20"+
Throws tiny midges through tungsten belly streamers.
Enough leverage for faster flows without being too heavy.
Heavy enough to cast in wind (its always windy!)
Stiff enough to rocket a fly under tight overhanging brush.
Although I just got a 6wt, and paired it with a sink tip line, very fun for long casts on stillwater.