First game: Yellow (Telling people that the first Pokémon I ever used is Pikachu, awesome!
)
Favourite 'Mon: Kabutops (I had one in my Platinum team, and didn't use it much, but it was always in my team and once I realized that I kept it and used it more and it "stuck" to me.)
Gen: I don't really have one. (1 is most nostalgic but technically worst, 2 was better but has the same problems and a tiny Kanto, 3 is nostalgic like gen 1 but for some reason I don't like revisiting it, 4 has my favourite games in HGSS but least Favourites in DPPt, and 5 had fantastic games with awful replay value like 3.)
Type: Water, I also like Ghost and Normal.
@toops Smeargle is also aesthetically my favourite. I don't battle competitively, though, so I have one of her and a Shedinja in my team as well(along with Kabutops they're my "Terrific Trio").