I've been admiring this one of late:
I believe this is by Koji Morimoto.
I especially like the dissolving person and almost watercolor faces in the backgrounds. Also anything that was featured in Robot Carnival is pretty damn good. This is a pretty timely thread as I've actually been working my way through some old 80's anime movies that I'm told are supposed to have been key animated by some of the masters as they were just reaching their peak. I hope to have more to contribute once I'm finally able to get around to some more.
Also here's one from July 2012 that showcases some great action pieces. Lots of mecha too, which is just right up my alley naturally.
