I think, in general, the 5wt is the most popular and possibly the most versatile for freshwater fishing. With that said, my favorite rod for Southeastern trout is my TFO BVK 3wt. I bought it in 8 ft with the 10 ft conversion kit. I LOVE THIS ROD. I can tight line with it or fish it traditionally equally well. It handles larger fish well but has light enough action that a 6" fish is still fun to catch. It's like having two nice rods for $300.