We had the same 31' TT for 18 yrs, 12 were in retirement. We've now had a 31' 5er for going on 5yrs.
The TT had a small slide for the sofa. Dinette and kitchen were in the front. Claim was to sleep 6 but 4 was more like it for adults anyway. A week in one spot was the longest sitting time. Used it a lot and loved it.
The 5er we've spent 3 months on one site every winter. Sleeps 2, has a inflatable mattress for the fold out couch and have used it on occasion but it gets crowded quick. Has a table and 4 chairs instead of the dinette but we mostly sit in the recliners with a small table between us. Like the 5er best, more room with 2-14' slides and a small one in the bedroom. Easier to hook up, tow and back at least for me.
Before we bought out first TT we went to several RV shows and made notes of what we liked and didn't. We didn't settle or deviate from our list, which is probably why we kept it for so long.
Don't believe what some salesman tells you. They will have you towing a behemoth with a Chevy Volt and your 1st experience will not be a good one. Figure out what you want and then figure out what you need to tow it. Get it right the first time, life is to short. Even with a MH you'll need a toad.
Good luck and happy travels.