We have been fulltiming for 2.5 years. Our longest stay has been about three weeks in one place but it was family related. When we move, it can be anywhere from 30 miles to 400 - it just depends on where we want or need to be. I think we would both go crazy if we stayed a month at any RVPark - we usually only last about a week in one. State/National Campgrounds we can do two weeks.
We both have lists of places we want to see and things we want to do. I'm a local food junkie so we find local food and try it from various places (here in Maine, it is blueberry pie). Then in down times, I try to make what we find, testing recipes. We both love historic sites and old decrepit buildings so we visit lots of them. We hike and walk. We plan our next destinations. In our two+ years, we have found that we miss more than we see and so always have a reason to return. We run out of time more often than not.
Much like Old Biscuit, we settled into a quasi-routine with a moving day, a cleaning day, site seeing days, and make sure to include an 'I don't want to get out of my sweats day' now and then. If you treat it like vacation, one can burn out quickly. If you treat it like a s&b, one can get bored quickly.
Figure out what you and your wife like to do or see. Make part of your travels center on that. We went to a tiny town in PA just to get a particular bread flour that is hard to find. Loved the town so stayed a week. We also figured out where an ancestor lived after getting off a boat in 1749 and went there to check it out. I'm not into quilting but there are quilting museums and stores and classes all over the country. Breweries and wineries and factory tours are everywhere. Find a local church, bar, dog park, diner where locals hang out. Hang out with them and get the scoop. Grab the local paper and see what events are coming up.
If, when we started out, we just parked somewhere because it was cheap, we would have quit soon after. We try to park with a view in a place open for exploration. If there is nothing to do there but watch tv, why bother?