It would be easier to name the dubs I don't like, since dubs are my default. I won't talk about that however, since that is counter to the purpose of this thread.
I like the Sailor Moon DiC dub and the Pokemon 4kids for all their cheesy glory.
I prefer the Nelvana* dub of Cardcaptors. Mostly because I like the tomboy characterization of Sakura better.
*which actually isn't the same as the terribly butchered version on kids WB
When it comes to Dragonball/Z I only like the Ocean Group/Blue Water and Harmony Gold dubs. I grew up with the Ocean Group/Blue Water dubs, so I the VA's over having Christopher Sabat voice half the cast. As for Harmony Gold I have only seen clips because it is rare, but it's not that bad, changed character names and was put out in 1989. So it's got retro-kitsch.
And Robotech, a lot of 90s shows cut out death and alchohol for T.V. This particular dub of Macross did not, and that's pretty impressive.