Media Blasters gets my vote for best anime distributor for releasing my favorite anime series of all time, Berserk. Even though some of it came out in 2002, the rest fininshed up in 2003.
ADV had really good year too. RahXephon and Devil Lady are some of my favorites. I gave up on Dunbine already, reminded me of Gundam a little too much. Ya I know Tomino was involved, that's the other reason I gave up lol
Pioneer. Most of their titles I don't care for but they have done a good job with X and the first DVD of Heat Guy J.
Manga? Read or Die eh ok. They'll never release Giant Robo so I went and bought the Korean box set. Awesome
Bandai. This company has really fallen of the map for me. Titles like Love Hina and .hack//sign, I have no intereset in at all. Big O season 2 is coming to DVD in December though....and Witch Hunter Robin starts in Sept? so things are looking up.
Viz. The only series I like from them is Inuyasha. But until they release an actual box set/brick of the 1st season, the bootlegs of the R1s from F/X(which are very good btw) will have to do.