I absolutely LOVE everything WDW but I admit there are a few things that tick me off:
-when one member of a family holds a spot in line, and then five siblings, two parents, and eight cousins cut in with that person right when he/she gets to the front of the line;
-poor personal hygiene in any circumstance (and this includes folks who coat themselves in four cans of body spray or drink so much perfume that it excretes from their pores);
-people (usually cranky moms) who show up a half hour late for dining reservations and get irritated because they need to wait a few minutes for the staff to squeeze them in;
-people who leave garbage on the buses or in public places (benches, beach loungers) just because they're too lazy to carry it to a trash can;
-people (usually men) who smoke outside of the designated smoking areas (and on that note, there's nothing worse than accidentally walking through a smoking area and getting a cloud of secondhand smoke blown directly in your path);
-as above, people who take 15,000 flash photos on dark rides;
-people who are oblivious to the custom of washing one's hands after using the washroom - GROSS!!!!!!;
-CMs at the WP who are less than educated in their own country's history (I've experienced this twice in Canada. Once, a female CM told a lady beside me that Canada has 12 provinces. It took all of my strength not to correct her.);
-people who constantly "ooooh" and "aaaah" during the fireworks, especially Wishes; and
-CMs who look at me like I'm from Mars when I ask for milk for my coffee. Maybe it's un-American or something, but cream in my coffee is just disgusting.
That's all I can think of for now! If I could somehow eliminate those annoyances, my WDW experience would be 100% perfect every time.