Bent shaft is the only way to go. Much better for your shoulders and allows you to make quicker, stronger paddle strokes.
First paddle was AT3 which was okay, but the right paddle blade broke in half a couple months into its first season. Second paddle was a Werner Player bent shaft. Great paddle, retired recently after 3 full seasons of 70+ days and kept in the truck for a back-up.
Newest paddle is a Woody Custom Kreeker bent shaft. Paddled this one about 15 days so far. Its got a solid wood shaft and is heavier than my first two paddles which I really like the feel of and it keeps your hands alittle warmer. It's my first paddle with foam core blades and they seem to be more stable and controllable in really squirly water and finish paddles strokes better by coming out of the water cleaner than the thinner blades. They are expensive but check one out if you get a chance, I think they are well worth it.