i rolled tepig "teh pig" because it was dual type, and because i knew everyone else was going to get oshawott/snivy.
also, since red/blue (and their remakes) the grass starter has only been grass and not grass/poison like bulbasaur's family--- the dual type of tepig's later stages helped motivate my choice. reminded me of blaziken. and i loved that flare blitz
I got Black, and pretty much the entire game focused on enemies my Tepig could beat. Plus, being the only dual-type helped. Really, the only trouble I had with him was Gym #1, which is customized against your starter.