02 got so much hate from the fandom, but personally I don't think it's that bad.
It's just like you said, it has way too many plot holes and the addition of a "6th Ranger" made it even worse since some of the things during the first arc just went up and disappeared in the 2nd. Not to mention, ending should have a better epilogue than that. It really felt like the last few episodes of 02 were horribly rushed.
But thank god we have Adventure 3 coming out next year to fix all of the problems that 02 plagued.
I did like 02, it just had too many plot holes, and the characters fell flat (except for Ken).
Excited for 03, but it sounds like it's a sequel to the original Adventure, so I dunno how much of those plot holes will actually get fixed; Keeping my fingers crossed.
On the other hand, Taichi is supposed to be 17 in 03, but it sounds like it'll be focused on Taichi and Agumon. I don't know how they're going to fix all the stuff with Daemon and the dark ocean without the ones who were most plagued by it (Ken and Hikari; Yamato and Sora had issues with the darkness in Adventure). Course, I'd be perfectly fine if they retconned some stuff from the end of 02 (being a Takari fan, myself).
I'm going to be shot but...
Dragon Ball Z, with all the constant games they're making now to somewhat extend the story somehow.
I feel like that they could pack a few more episodes instead of a movie every two years or so years.
I frankly think that DBZ should have ended at the Cell saga (as much of a Gohan/Videl fan I am).
GT was horrible (now I'm gonna be targeted XD ), but then again, Akira Toriyama had nothing to do with the story. The newest movie was a hilarious yet horrible flop (I found the interactions between the child-Mai and Trunks to be more interesting than the rest of the movie; so, yea, I'd like to see more about that, I'll admit).
I think if DBZ had to continue and increase the powers even further, we'll have golden oozaru performing fusion to skyrocket the power levels. I really, really don't want to see that. >.>;;
