Gatwick is nice, although be prepared that when you leave the departure area is a bit cramped. There is a few nice pub-ish places to go, so save a tenner for coffee and food. And the train ride isn’t too bad, it’s less stressful than Stansted.
Well I don’t plan on spending that much time in the area. I’m lucky enough to get a ride both to and from airports on both sides, so with a little luck I will have no need for anything but my water bottle and perhaps a small snack. ;)