Sundays are for Disney:
This is definitely a too many to name question for me. My all-time favorite is "Part of Your World". It probably hits a little too close to home for a guy in my mid-30's. I'm getting better at doing a passable impersonation of a normal human being though.
I also love "Belle" and "Gaston" from the animated Beauty and the Beast (every song from the animated version is better than the live action film). On the flip side, I like the Celine and Peabo version of "Beauty and the Beast" and the Michael Bolton version of "Go The Distance". I really love virtually the whole soundtrack of Tarzan but, specifically, "You'll Be In My Heart". Like I said, too many to name. There are so many more I'd like to list but I'm going to stop before I list the entire Disney songbook.
Glad to see the mention for "Why Should I Worry" from Oliver & Company. That was the first Disney movie I saw in the theater and that song, if not the entire soundtrack and movie, is really underrated.
I have a few songs that I don't particularly like or would call overrated, I guess, but music is too subjective to mention them. (Although the opinions bashing "Let It Go" were objectively bad)
I'm not in the parks enough to know all of the musical cues or really remember soundtracks for specific rides or areas. I do know that part of the magic of the parks for me is walking around and suddenly registering a new version of a familiar song. I'm honestly not convinced I'm completely in control of my own faculties in Disney Parks and that the soundtrack doesn't have me in some type of semi-conscious trance (that implores me to spend all the money and leads to such in the moment thoughts as "Dinoland, USA isn't that bad").