I like Charmander the best of the fire-type starters, but I like Cyndaquil's evolved forms more than I like Charmander's evolved forms.
Charmeleon, Charizard = Meh They're okay...
Quilava = I like it and Cyndaquil equally. In other words, I find it awesome.
Typhlosion = I like this one, but not quite as much as its pre-evolved forms. It still rocks, though.
As for the fire-type starters in the third and fourth generations... yeah. My current trend of picking the water-type starters should hopefully explain my preference for Torchic and Chimchar.