I think the first five are pretty much only in order. After that...well...just as they come to me.

1.) James Cameron's Avatar - hands down, my favorite movie of all time.
2.) The Hunger Games movies.
3.) Prince of Persia: Sands of Time.
4.) Tangled - favorite animated movie of all time.
5.) Harry Potter movies.
6.) You've Got Mail.
7.) The Last Song.
8.) Salt.
9.) Interstellar/The Martian - cause, really, you could flip. Interstellar is more fantasy while The Martian is more realistic. I loved both!
10.) Lord of the Rings.

I think I basically love any movie that after watching it, feel like it has changed me in some enormous or even insignificant way or I can take something away from it.