Dean- You love how faithful he is. You know he is a player but since he started dating you, he only has eyes for you.
Sam- You love how much of a geek he is and how smart he is. It isn't often that someone can tell you everything there is to know about mythical creatures, especially how to kill them.
Cas- You love the way he looks at you, like you are the most beautiful woman that he's ever seen. To him, you are the most important person in the whole universe.
Gabriel- You love how much energy he has. He always wants to do something and he practically bounces off the walls when he can't (probably because he eats so much candy).
Bobby- You love how kind hearted he is. On the outside he may appear rough but on the inside, he is very kind. After all, he adopted two boys that became heroes.
Lucifer- You love how protective he is of you. He would choose you over his demons whenever you are in danger. There is nothing that he wouldn't do for you.
Crowley- You love his sense of humor. For being the King of Hell, he is usually in a pretty good mood and says a lot of sassy things that come across as funny to you.
Balthazar- You love how free-spirited he is. He does what he wants, even if he is forbidden from doing it.
Adam- You love how patient he is. When you rant about your day, he sits and listens without interrupting but you know that he cares.
Chuck- You love how he always makes time for you. Even when he's busy writing his books, he always makes sure that he spends time with you, even if he has to put his writing away to do it.
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Supernatural Preferences
FanfictionDean, Sam, Cas, Gabriel, Lucifer, Bobby, Adam, Chuck, and possibly Balthazar. Disclaimer: I do not own any of the characters from the show