My favorite starter Pkmn by far is Squirtle. I used him when I first bought Pokemon Blue many years ago. He is irresistably cute, and when he turned into his final evolution, Blastiose, I was unbeatable. Blastoise using Hydro Pump, Skull Bash, and Surf is incredible. I love that Pokemon.
In Pokemon Blue, my team was my favorite of all time. I used the six all the way through the game. They are: