20.He loves him some pie!!!
19.He is lover & a fighter!!!
18. He can kill any evil thing that comes after you!
17.He's funny!!!
16. He's clever!!
15.He listens to badass music!!
14. He has a badass car!!
13.He can find あなた the best ベーコン チーズバーガー in America!!
12.He's smart ( He does have his GED after all)!!!
11.He's smartass!!
10.He has the best lines on the show!!
9.Destiel!!
8.He sings even if it's a bit off key it's still sexy!!
7.If あなた need a drinking buddy he's your guy!!
6. He will do anything for anyone he loves!!
5.He's loyal!!
4.He is super sexy!!
3.He's Batman!!
2.Jensen Ackles!!!
1.He is the BEST brother in the world!!!

That's some of the reasons I 愛 Dean Winchester ;)