Well, I watched the dub before I was ever introduced to the sub/RAW. I enjoyed Pok?mon until the Johto arc. I was got so fed up with the repeated fillers where everyone required help for their Pok?mon, being it evolving, managing its behavior, or helping them become the best whatever they were aiming for. Sure, Pok?mon anime always had that, but the Johto arc had way too many of those generic plots. I just stopped watching it weekly, sometimes tuning in to see whether or not an actually decent filler turned up. Then, with the news of the Advanced Generation season, I felt like watching again. (I had looked at Japanese clips when I found out.)
I watched a few and enjoyed it, until I was introduced to the Japanese with English subtitles and RAW, and liked it even more. I wasn't even all that bothered with the fillers; I just thought it was better than Johto's. It came to the point where I abandoned the dub for the original, so.. That's how it went.
Like Dark Weezing, I came close to forget about watching the anime, but for different reasons. As for RaikouSpecialLover, I actually quite like the idea that it doesn't follow the rules of the game. I like that Pok?mon can learn more than four moves. (Forcing yoru Pok?mon to forget a move? wtf?) I like how combination of more than one moves can work. It influences my Pok?mon RPing. Levels in the anime seem to mean it's "point in its stage". See how some Pok?mon could just decide to evolve or not? Satoshi's Pikachu could be very strong, but because of its size, and possibly its disadvantage in stats prior to no evolution, it can be easily taken out. o_O
That's just my two cents. Can mean anything or nothing. ^^v