There's nothing crazy about going from a FW to a TT. I know a couple who have done it for the lower profile and getting the bed of their truck back and several others who are considering it. Another reason some consider going 'back down' to a TT is to help their knees by getting rid of the additional steps to the bed/bath.
Of course it takes a little more effort to hook up a TT for towing each time, simply because you're hanging the tongue weight some 5 or 6 feet behind the rear axle, which has the teeter-totter affect of removing some weight from the front axle and gives a side-to-side lever through which a TT can try to turn the truck. These are easily addressed by a number of effective weight distribution and sway control hitch systems, but they ARE an addition that is not even on the table with a FW.
There are some nice attributes to towing a TT as opposed to a FW. I personally like the lower profile of a TT when height clearances can be a factor and I find backing a little less sensitive to slight 'misses' of the steering angle, allowing me to back faster if helpful. As was mentioned, in turns a TT tracks behind the tow vehicle a little more closely, but I don't know if it negates the extra overall length of a similarly sized trailer.