Well, one advice...if you're going to go to Tokyo
Disneyland is don't go on the weekend. I hadn't planned on going on a Saturday but the day I had planned was the day a typhoon was scheduled to hit Tokyo...and DL is right on the coast so we decided to stay close to the hotel instead.

So we ended up going on a Saturday...a nice, bright sunny day...with the entire population of Tokyo!! Holy crapola, was it every crowded. haha We managed to go on one ride (Pirates) but we did try to concentrate on stuff that wasn't in the other parks so we went to some shows. The Japanese have their non-American habits which we found rather fascinating. While waiting for the shows, in the very hot sun, they all pulled out these thin little mats (most of them with Mickey Mouse) and sat on them...and then they pulled out their umbrellas (again...Mickey!) to shade them from the sun. Alas, my umbrella went missing during the entrance security check. <sigh> So I baked.
Disney Sea, the other park in Tokyo is AMAZING. If you get to Japan and can only go to one park, go to Disney Sea...it is unlike any of the ther parks...except for the Indiana Jones ride. I loved it there.
As for Disneyland Paris... well... it was quite interesting to see the difference in the rides. The Haunted Mansion was the Phantom Manor and they had a Boot Hill/cowboy theme to the end graveyard. And the outside of Pirates is rather amazing. The castle is in nice pastel colours. But, overall, I don't think I'd go there again. LOL My brother went to the Louvre and I went to Disneyland. I'll opt for the historical culture if I ever go to Paris again.
One thing about non-American Disneylands (with the exception of Hong Kong) was that queuing up for the character photographs was non-existent. It was a free for all. In Japan, it was mob city and they were practically abusing the poor people inside the suits. At least in Hong Kong, they had photo areas set up and designed so you had to line up. Got some great pics there.
This Dec cruise will have accomplished my goal of going to every Disney Park in the world and a cruise within a 2 year time frame (well, I miss the 2 years by 2 months....but close enough.)