1 and Animatrix are fantastic!
Seeing the Matrix on original cinema release was fantastic because the viral advertising and the "what is the matrix?" tag line really increased anticipation, and I (we?) had no idea what to expect. And it was brilliant. You can't recapture that experience now.
The bullet-time effect was terrific and groundbreaking.
I have enjoyed going to some of the locations in Sydney.
2 - great Ducati bike chase in 2, and of course, Monica Belluci
At times (like during Morpheus' speech) I expected R2 D2 and some Ewoks to appear!
The rest was so-so and really just padding between 1 & 3
3 - well, it tied it up, fairly predictably. The main battle scene is raved about by many for the CGI etc, but it didn't really do it for me.
The Animatrix, superb, and a brilliant idea: great variety, range of animation styles, great sound track, good plot hole-fillers and links, quite trippy at times.
Matrix fans will probably enjoy this animation:
http://www.bancruelfarms.org/meatrix/
(turn sound on)
(okay its a bit of propoganda, with which I agree, but it's still fun)