First of all, they are both OVERLY protecvtive and get jealous easily.

Second of all, THEY ARE WINCHESTERS. you cant argue with them. they will win, you will lose. 

You need something from the top shelf, boom. Deans there. 

Need something from the store in the middle of the night? Sams already got the car keys. 

Lets face it, YOU GET ENDLESS CUDDLES. 

Getting into bar fights after some douchebag hits on you.

ALWAYS wearing their flannels and jackets when youre cold.

Dean wondering where all his flannels have been going, then finding them in a pile on your closet floor.

Dean WILLINGLY letting you steal a few of his beloved pies.

Sam lets you braid his hair, but Dean doesnt know about it.

Surprise kisses, hugs, make-out sessions, etc.

Sorry I was gone for so long! Hope you like this one.

I have to get back out of writers block.