This is purely anecdotal and comes from some self-reflection, but my partner and i have very different ways of expressing vulnerability.
If I turn to her and say "fuck, what a day! My computer's a piece of shit, everyone i work with is just out to make life hard for me and I didn't get to my workout because i got stuck on a phone call with clients", I may feel like i'm displaying some vulnerability but she thinks i'm just being a whiny bitch.
I don't anyone finds that style of weakness attractive, but I'm finding it very hard to break out from providing a list of complaints and instead processing how they make me feel.