That's hard! I think it would depend on the place. If it was like Hawaii or something where I probably wouldn't have another chance to go, then I'd go there. but if it was somewhere where I could go another time then i'd definitely go to WDW!
WDW is great. If I had to choose between it or some other place like Germany or Ireland I would have to pass up WDW because I have already been there three times. I probably wouldn't get the chance to go to another country again.