Dean
Dean loves your smile. It lights up his world when that smile is for him. You like how he stands. The way he holds himself, the way he leans on the Impala is beautiful to you.

Sam
Sam thinks your eyes are pretty. The color of your eyes shines brightly when the morning sunlight hits them.
You love how tall he is. It might seem weird, but you just find his height really cool.

Castiel
Cas loves your hair. He loves the way it looks so naturally beautiful without you ever doing anything to your hair.
You are quite fond of his blue eyes. You've never seen eyes with that shade of blue before.

Gabriel
Gabriel believes your boobs are your best physical quality. He likes to hold them.
You like his butt. What? He's got a nice butt.

Lucifer
Lucifer loves your birthmark. You don't like it that much, but he makes a good argument that your birthmark is definitely part of your beauty.
You like how cold he is. Now, this is strange, but you've just always liked the cold a bit. You can lean against him and count on him to be a bit cold. It's comforting.

Crowley
Crowley enjoys holding your hands. He really does love your hands. He loves the way your soft hands feel against his.
You like his beard. Whenever he gives you kisses, the beard tickles your face a bit. Another bonus is that it makes Crowley look hot.

Balthazar
Balthazar likes your legs. He likes to run his hands up and down them when your legs are on his lap.
You adore his lips. You adore the way the feel on your lips and your cheeks. You adore the way they look.