Speaking of the old DCOMS (if that's what they're calling them now), I loved Smart House.
Yes, that was one of their best. Brink! was good, too (the one about the inline skating enthusiasts and their rivals who skated for money rather than for the fun of it).
Others:
The Rescuers Down Under- the Disney movie that everyone seems to forget about. True, it was a sequel to what can hardly be described as one of their most memorable films, but this movie was awesome. I remember being a little girl and watching this with my older brother every summer in the top floor of our grandma's house.
Cars- I don't get why everyone seems to consider this Pixar's worst movie (to me, that dubious honor goes to A Bug's Life, but I talked about that in another thread). It really was an impressive piece. The animation was great, the characters were fun and memorable, and the story was fun.
Don't Tell Mom The Babysitter's Dead- I actually just got through watching that about ten minutes ago. Granted, I've recently discovered that this movie is gaining a cult following, but it still doesn't get nearly as much credit as it deserves.