Well, I don't like that Gen V has 4 games instead of a pair + 1 more game. They could have done what they did in BW2 with just one game, call it Grey and fuse Kyurem with both Reshiram and Zekrom instead of just one of them... Not that I don't like the Kyurem formes but I hope in gen 6, if they keep the sequel thing, I prefer it to be only one game, it's more pratical (Examples: I have all 4 gen V games just because there are version exclusive legendaries in B2W2. Then, there's the starters thing: I choosed Snivy in White, then Tepig in Black and decided I'd pick Oshawott in Grey, but they came with 2 games instead of 1 and now I choosed Oshawott in Black2, but I have to resort to other pokémon in White2 cause I don't like to repeat starters, in other words, 3 games would have been enough to get everything if it wasn't for the exclusive legendaries)... It's also a matter of taste though, I like trilogies, so 3 games for me it's like the perfect number conceptually.