Mine is Hariyama. These sumo wrestler Pokémon interest me being really big, bulky, and strong. Supposedly they can lift whole trucks and throw them long distances.
I never really had strong feelings for fighting types, I really like Heracross since gen 2 but even that wasn’ta top favourite. That’s all changed in the last couple of years though, I think Gapdos is great take on a classic, Iron Hands is a competitive monster, and Quaquaval is one of the most fun starters in a while.
I think machamp will always be my favorite fighting type. He's pretty badass with the four arms and the herculean muscles, but he's also got that goofy king dedede "beak" mouth which balances that out with a bit of silliness. Primeape, Lucario, and Hawlucha are some honorable mentions.