From the establishments (the parks, resorts, etc.) I expect cleanliness, especially in the rooms if I am staying on site. No need to get overly crazy, I don't care about every spill or dropped item, but if the parks look like a dump or if the resort rooms feel like a rundown Motel 6, we have issues.
From the staff, I expect courtesy that should be expected of anyone in a position that has to interact with people on a daily basis, but I'm also realistic. Friendly greetings, please and thank you's, perhaps a smile if it wouldn't hurt too much. They aren't exactly being paid buckets so they shouldn't ever have to dance like a monkey just 'cus a random guest tells them to like some expect.
I don't expect anything out of other guests because that's just asking to be disappointed.
As for whether or not these expectations are met, there are always brief forgettable exceptions, but in the majority, they are. My cases of meeting rude or dismissive CMs are few and far between, enough to count on one hand, which is impressive given the number you encounter on one trip let alone the amount of times I've gone. The cleanliness has never been that big of a problem to me, though I have noticed a decline in recent years in regards to the parks keeping control of the litter.