I remember watching the first 3 "seasons" (original,GX and 5d's) when I was younger, but I think GX is one of my favorites, even if I only remember "space station destroying the earth stuff". CARD GAMES ON MOTORCYCLES were also cool.
Yugioh 5Ds was the best imo, unusually serious despite the silly concept that always gets made fun of. It did lose some of its grittiness after the second season though. The first two seasons pretty much feel like their own distinct story arc and the other 3 are different. Haven't seen the dub, no idea how bad it is, but it is 4kids iirc.