Most definitely travel the world, like King Eric said! A theme park is just that--a themed idealization of a place. It is absolutely no comparison to the real thing. See as much of the world as you possibly can while you are able to! And think of it this way...souvenirs from France are much more intriguing than souvenirs from Disney World.
I would defiantly travel. Looking back at my past trips to Europe, I just love being somewhere that the culture is so different than being here. I fancy a good dose of change frequently and always enjoy a good adventure.
One of the scariest moments I've had was taking the wrong route on the Metro in France. I ended up hours away from my intended destination, but reflecting on the incident, the scenery was some of the best I experienced. Point being, I love chasing novelty. Give me that adventure...every time!
For Parks that I haven't yet visited, I would prefer to go and see Tokyo Disney Seas, first, and next up would be DL Paris. Universal Islands of Adventure is 3rd on the list. WDW's Animal Kingdom is on the list somewhere after those.