He's instantly hotter if...

He's good with kids.

He has good teeth.

His voice is deep.

He is good at the art of conversation.

He has a dog.

He has an accent.

He's super rich.

He has a special talent or hobby.

He's really tall.

He's very well dressed.

He has a big "Jon Hamm" in his pants.

He's an excellent cook.

If his pants hang off his hips!