was there twice last year and didn't like the way the mainland chinese behaved. was in the queue and these 2 girls came rushing past us and stopped just a few heads ahead of us. we didn't paid much attention thinking they were with their parents (the couple standing ahead of them). as the queue was long, we assumed that the parents must be waiting in line while the kids wandered around. to our shock, a group of about 6 adults just walked up to them and stood in the queue. the family behind them was furious and demanded they queue up. but they insisted they were in the queue cos' the kids were there. they were pretty aggressive and was about to hit the guy who told them to queue up when the staff came and broke it up. though they have to leave the queue, they were still cursing and one of them spit on the floor at the family. this was not an isolated incident. queue cutting was pretty common the 2 times i was there. so just keep your cool when dealing with them.
they don't seem to understand "wait for your turn". taking pictures with the disney characters is another big headache. you queue for your turn and when you are about to have your picture taken, one of them (those not in the queue) will quickly run up and have her picture snap thus spoiling your picture.
apart from these, disneyland is quite a nice and small place. checkout what time the firework is and plan your schedule. don't think you need to spend the whole day there.
i stayed in both the disney hotel and disney hollywood. prefer the first but the rates might have gone up.
have fun.
cheers