Sounds like you have the adventure gene and are looking for an uncomplicated way to fulfill it. One of my most memorable flights was when, as a GA pilot, I flew my ultralight Quicksilver MX on it's first long XC, 65 miles. It was liking riding a bicycle across the sky, after driving my mom's station wagon to do the same all those years.
As is being pointed out, you are in for a great time, but you may be limited in your distances, unless you have a ground crew or can find airports with fuel within your limited range. Since you already have a pilots license, and are interested in an ultralight type aircraft, you may want to take a closer look at what an ultralight type sport plane can offer, particularly if cross country flights are something you definitely want to accomplish. I have a Quicksilver Sport 2s. and because it is N#d as a sport plane, and properly equipped, I can go anywhere I really want to, and land at any airport I need to. The best part, I still get the experiences of flying an ultralight type aircraft, and the unforgettable memories of flying cross countrys in that type of aircraft.
Below is a link to more info re. XC flights in the Quicksilver, and what it's potential can be. Also, if you go to YOUtube and look up Quicksilver Across America, and Quicksilver down the Hudson, you can get an idea of your scenery if you choose that route.
If this helps you, on my flights across the States my legs were 75-130 miles, the longest 2 1/2 hours. Flights closer to 1 hour or 1 1/2 hours seemed to be the most enjoyable. I would fly up to 8 hours a day, the average being 6 hours, which the plane is capable of, so it comes down to what is enjoyable for you.
Best of luck,