The Last Unicorn probably qualifies also. Just the title song alone is brilliant one of the best songs from the 80s.

I haven't, but The Iron Giant tops it. This one is probably on my top 5, though.

^ This guy actually gets what an underrated film is.

It used to come on HBO sometimes when I was younger and couldn't really follow it, or miss the beginning. I should see if I can find it online with the magic of high-speed streaming Internet.

I was just trying to think of the name of this to use it in my post but you beat me to it. I love this film, though. +1

Yeah, Titan A.E.

REDLINE. A 2009 racing anime film. Seriously, it have one of the best visuals ive ever seen in an anime, completely hand drawn with flashy colors and psychedellic sequences. It must be experienced, anime fan or not. Please look it up

Here's a trailer
https://youtu.be/R2H_FsmxWzc

Its soundtrack, which is also a bright point of the movie, is also very underrated. It fits the movie perfectly.

http://www.imdb.com/title/tt0318871/