I was talking to someone about this, but I realized I don't actually know anyone's favorite Pokemon besides mine and Pheos, really.
Mine is Gengar, if you didn't know. I love the whole Gastly evolution line, with Haunter being my least favorite of the three (still like him though)
If I limited it to starters, it would be Totodile and its family. Especially now that we finally have its hidden ability which is amazing