Dubs:
Hellsing, Trigun, Cowboy Bebop, Darker than Black, Full Metal Panic, Rurouni Kenshin, Evangelion, and Eureka Seven
Subs: any anime
Look Dubs most of the time is like watching Godzilla, you notice how the mouth doesn't move right, and also how the words don't always go with the flow.
Subs are great in my opinion, they have the right attitude, timing, and they even make more sense. Dubs, i can live without since they serve no point, take away from the actual dialogue, and take literally forever.....(Code Geass R2 is still going on in Adult Swim...its halfway done i think, another 2 years till its done lol....)
-Edit, then again I tend to read more manga then watch anime, the artwork is like 400% better and there isn't a filler episode lol.