gen 2. I had so much fun with the storyline and new pokemon in that. I was all ready to get pokemon sapphire, bought it with the money i'd saved up, and after a half an hour of playing, i turned off the game crying. THe storyline made me so sad, it just wasn't any fun, and the pokemon were beyond dissapointing. all it was were a bunch of little gimmiks and features you used maybe once the whole game. then i bought FRLG, which, in my opinion, wasn't as much fun as the original version. then i made the mistake of buying diamond. More horrible pokemon, more gimmiks and 'features', and another horrible storyline.
also, i like how the champion in gen 2 had a good part in the plot. and i like being able to go to both johto and kanto regions. whereas in the other ones, you can't go anywhere. and i like how it was obvious Nintendo actually cared about their devoted, loving fans. BUt that's all out the window now.
Damn nintendo.