I don't think we're comparing about who would win. It's about which do you like better... and most people I know like Fire because of their offensive nature. With the exception of Ninetales and Moltres, I find fire types too boring because they're always about hitting quickly and sweeping and die to Earthquake thing... somewhat like a mini-electric type (electrics are broken).
Water Pokemon all have different strategies because there's just plenty of them. Some are bulky, some can be sweepers, some can be supporters... I just like their varieties...
It's just Ponyta and Chimchar... how boring is that?! Get Platinum... now! They give you Magmar, Houndoom... and Flareon as well as Rapidash and Infernape. The scarcity of fire types makes me wonder why that is the case...