TT vs 5th wheel

Another nice thing is you get virtually no sway when pulling a 5'er. No messing with WDH setups.

A 35' 5'er and CCLB truck will be about 52-53' OAL.
A 35' TT and CCLB truck will be about 60' OAL.

You can squeeze a 5'er into a shorter spot because you are able to back the truck under the front by splitting the 5th hitch and one side of the truck bed.

Hitching and unhitching is simpler as well. No cranking on chains or lifting bars onto brackets. No WDH sticking out from the rear of the truck. When hitched up you can walk between the 5'er and truck as opposed to climbing over the tongue or walking around the TT or truck.

5'er's as a general rule are less susceptible to winds and semis'.
It all just boils down to personal taste. Some don't have a truck big enough to haul a 5'er and choose a large TT instead.

You offer insightful comments. Here are some more. Most fifth wheels are built with the floor higher off the ground than most TT's. This means more steps to get into the fiver and, of course, the fivers almost always have steps into the bedroom area and often bath room. The fiver's section above the pickup bed increases the overall height of the fiver that can be problematic in some campgrounds and often offers more wind resistance when towing. As far as hitching/unhitching you mentioned some good attributes about the fiver over the TT; however, failed to mention that many factory 4x4 trucks today are so tall that to have a level fiver when towing the fiver needs to have it's axles repositioned or compromise bed clearance at the truck. If the axles are repositioned then the height of the fiver is increased even more for both getting in and out and overall height. With a TT it is very easy to use a drop shank and have a level trailer without repositioning axles. Also, using a Hensley, ProPride or PullRite trailer hitch the sway issues are almost moot. These hitches eliminate sway, not just mitigate it. Fivers tow well due to the hitch being over the rear axle. The PullRite hitch puts the pivot point of the hitch eight inches behind the differential, virtually the same as a fifth wheel hitch. In fact, is it often considered to work like a fifth wheel hitch under the truck's bed. None are cheap, all three work. None need air ride hitches to eliminate chucking or bed savers in case you forget to correctly latch the hitch. Everything about the difference between a TT and FW hitch is about trade-offs.

Choice is more about personal preferences than any hard and fast rules about full timing. I suspect more folks fulltime in a fiver than a TT but there are many that have full timed in Airstream trailers for years and would not trade for anything according to the Airstream forums.