For physical attraction, it’s hands and forearms for me, body shape itself can be anything, teddy bear to bean pole is fine (though I agree with others in saying a bodybuilder isn’t my cup of tea). A well suited beard is also great.

Physicality aside there’s got to be an emotional connection there first… shared views/values and interests (or being willing to explore something new if it’s a new interest for the other) are really important. Empathy and kindness are also vital, I don’t have room for assholes in my life.