I am the original owner of the TT in my sig. It weighs right at 6,000 lbs. fully-loaded. I originally towed it with a '99 Suburban 2500 with the 7.4L engine. It was a great setup.
I finally replaced the 'Burb with the truck in my signature last year. After having the trailer for a long time, I am ready for a new rig (either a TT or 5er). My priorities are:
A walk around bed--no more crawling over my wife (or vice versa) at night.
A heat register in the bathroom--it gets cold in there at night.
Nice seating to lounge around or to watch TV. The dinette seats are not comfortable sitting in for a long period of time.
An oven that can be electronically lit. No more squatting down to get the pilot light lit.
My TT has served me well, but there are some things I want in my next rig.