I never minded the two sequels; they weren't groundbreaking like the original, but they weren't the total cinematic suckitude that I find Episodes I - III to be in Star Wars.
I thought the Animatrix was a nice bonus, too, and helped make more sense of how they got to the second movie.
I'm curious to see what they do in four, especially knowing that two and three were so poorly received. They can work to avoid those pitfalls. Had they not filmed the third at the same time as the second, maybe they could gauged reactions and made it a better movie to end the trilogy. (But as I stated, I never loathed either of them.)
Q "Why do you like Duke, you didn't even go there." A "Because my art school didn't have a basketball team."