Though the powerful forces of Nostalgia has caused me to cherish both immensely...except the current version of Pokemon. Stopped after Diamond and Pearl:Galactic Battles...barely made it through that, I dare not watch the current one. Oh and that one series where the digimon were on the police force or something. Now that we've gotten the horrors of both series have been dismissed, I must say....Digimon.
Better plot, better characters,...it was just better.
Pokemon was great an all, especially the first 5 generations. A.K.A every generation with Misty. The equation was simple but it worked. Walk around a bit, help some random people, blow up Team Rocket, go to a gym, blow up Team Rocket, catch a new Pokemon, blow up Team Rocket, RUN INTO THAT SMUG ASS GARY FUCKING OAK RIDING IN A CORVETTE WITH CHEERLEADERS, blow up Team Rocket, throw in some sappy stuff, repeat. Not the best system, but depending on how they worked it, pretty entertaining...then again I was like 4 when I started watching it soooo....
But still, Digimon. I don't know, I just thought the overall story was better than Pokemon's because...well, it actually had a story. People were actually in danger, the characters had a bit more depth, and it was honestly more mature. Pokemon was just fun, Digimon was work.
Edit: But Pokemon did have some pretty good music!
And hey, can we give these old fucks some honorable mentions?