Just thought of another little tip to share. Really look at the themeing that Disney does on its lines and on the rides themselves. They put a lot of effort into immersion on the rides, much better than other places IMHO.
Now the second reason I tell you to look closely is to find hidden mickeys. Hidden Mickeys? What are those you ask? Well those are Mickeys (ears, face silhouteet) found on rides or in lines, or in the park itself.
More info here on Wikipedia
Also ,to get you started, I will give you a hint to find one. On Haunted Mansion, look at dinner plates.
And here is my favorite, one we found on the ground in Animal Kingdom (they used the cracks in the concrete to form it)