Our current tt is 35' long tongue to bumper. I love the space and it has everything we want but if I were to do it again I would go smaller.
Towing is fine, ours tracks straight and stable in all conditions with our Ram 2500 and Hensley. Pulled good with our previous Tundra too, although a little over weight. I actually find longer TTs are easier to reverse, but you do have to turn wider etc. You need to plan your routes and fuel stops a little better too. There are a lot of stations we can't get in to or have to reverse out of.
The biggest downside for us is the limited number campsites that we can fit into. Campgrounds here book up 6 months in advance so you have to be on the ball to get anything and only about 15% of the sites fit 32'+ trailers. Many are not pull throughs, those that do fit our size are very difficult to get in/out of and are far from everything to do. Our next (once I can get the kids into a tent on their own) will be 28' or less.