There's something about bad boys with a heart of gold that just makes me melt. The way he's so genuine and straight-forward, kind and patient but also super eccentric and quirky makes me smile. I was pleasantly surprised because I stopped reading the manga during the start of Skypiea when I was a kid and never picked it back up, so I never really got to Water 7. Because of that I had written Franky off as another shitty ass dumb fuck pervy trope character-, cuz lets be real he kinda looks a bit if you squint your eyes.
But huh! This funny silly blue haired weirdo is just so full of personality. He's grounded but also has a flair for being wacky and cartoony almost. He's got a mechanical mind-, suuuper smart-, and it's not just used for building junk. Franky knows how people work just as well as he knows how ships work, and that's attractive to me hehe
Older men-, YES! Protectiveness-, YES! Giant man boobs-, YES!!!

Also he's just eerily similar to my actual husband hahaha! Franky is just literally all things I find attractive and interesting in a man put in one chiseled and goofy package.