Fire is considered to be the weakest type out there because of its Earthquake, Surf & Stealth Rock weakness. Nevertheless, I love fire type Pokemon. I love everything about them, their underdog image, their designs, their attacks...
Even though I do not train fire type Pokemon ONLY, I would say I specialize in the Type. My goal is to own a decent IVed, EV trained version of every existing fully evolved fire type (I already did this with Infernape, Arcanine and Houndoom). I am not in a rush tho, as I enjoy raising other Pokemon as well. I also have my fire Pokemon in mind when I'm raising other Pokemon. Having thoughts about how they could support my fire types, what fire weaknesses they could cover and so on.
You see, I'm a fire enthusiast who also enjoys other Pokemon types & especilly Pokemon breeding.