Piplup probably looks the cutest, but I tended to prefer fire
starters the first time I played Fire Red and Sapphire because I
liked the feeling of easily fainting the beginning chance encounter
grass pokemon since the first areas tend to be forests. If I had to
chose, then probably torchic.
Has to be a tie between the feraligator line because I always found
the final evolution to be cool looking, and then thanks to the
anime and it being so God damn happy then I can't help but love
totodile and it's whole line return, Samurott because my first
generation was Gen 5 as I tried my best with Snivy but up and went
with the water one so I could beat the game, (I also like to call
it s final evolution Sammy for fun) and then there's the Quaxly
line, this is because I feel like Quaquaval is one of the most
alive and not dead looking and actually looking like they have a
personality for a starter and a Pokemon in general for a long time.