When I first got Pokemon Blue, there was only one logical choice for my starter:
Bulbasaur
I ended up regretting that decision, because Bulbasaur kind of sucks. So when I got Pokemon Gold, I knew I wouldn't repeat that mistake. Not only did I not pick the Grass type, but I made sure my rival didn't either. That way, the Grass type could sit on Elm's table and rot. Thus my love of the Fire type began.
I've tried other starters, and Greninja was the only one I loved that wasn't a Fire type. Nothing against Water types, but everything against Grass types.