Bulbasaur, Squirtle, & Cyndaquil.
The others just didn't appeal to me.
In most games I end up dumping the starter for a better suited
Pokemon of that type to my team.
Least favorites would have to be Piplup, Snivy, Tepig, and Treecko.
The others are alright, in my opinion, but not in my top picks.
Over all, Bellossom would be my favorite.