The first thing I'd check is under the sofa, passenger side. More than one of us has found that the sofa leg falls into an incorrectly cut wiring access hole in the floor, causing the sofa leg to pinch the wires against the rough edge of the hole.
The power jack goes out if you allow rain on it...keep it covered with a bucket or something! It's downright stupid that something built for the outdoors isn't water tight.
The day/night shades are easily broken. We have the one on the forward wall of the dining slide on the floor.
The vacuum breaker (?) on the dometic toilet has gone out. We're currently using a small bucket to fill/flush the toilet. (I hate the height of this toilet, feel like I need a foot rest.)
Plan on placing small sections of "pool noodle" on the drawer handles of the dresser in the bedroom. Without this the handles on the dresser rub the drawer facings under the bed when the slide is in (and vice versa).
Don't get me wrong, we LOVE our TT! The floor plan is absolutely perfect for us. We have the platinum package and absolutely love the upgrades. The only change we'd make is the amount of outdoor storage. The only basement storage is the one that goes underneath the bed slide.
The island sink in this kitchen is awesome and we love the Corian counter tops.
Oh, and watch out for rusting bolts on the steps. We're requesting replacement of those as well when she's in for warranty work. We bought the last of May and the rust started showing up within 2 months. Not acceptable.