I say my favorite Gen is II or V. I liked II because it had two regions, it was a lot more balanced that Gen I, and had the Gameboy color Charm. The Gen V also has the best graphics, the most possibilities with pokemon and moves, and it's just has a lot more features overall.
I liked that as well, especially since it had to do with the plot of the game and such, with Team Plasma interrupting your battling the Elite 4.
Am I the only one that thinks a lot of the Gen III pokemon are a bit boring in terms of design?
I'd have to say crystal, since it was the first game I played when I could finally understand the majority of the game. Like with previous games, my reading capabilities weren't the best since I was a little kid and all. Also Crystal started the choice as playing a female, and it also has one of...
I used them a lot in Gen IV, but I really don't use them for their abilities specifically, like I might run out of Ultra balls, so I start using those extra pokeballs I end up getting along the way when trying to catch a legendary or something.
I usually play as the male, exceptions being in Crystal, Emerald, and Black2. I played as the female in crystal because playing as female was a new thing, and I thought it was great, in emerald because I played as the Male in ruby, and in Black2 because I really like Mei/Rosa's design.