@SlayerBVC  
(The following is NOT at all serious!)
 
Derpy = The functional alcoholic. Well, almost! (Why do you think her eyes are always like that?)

@SlayerBVC
 
Good work…About the same but I’d put Dash or Fluttershy as the ‘Sad Drinker’.
 
Or Fluttershy being the stupid drinker.

Okay it’s official. My headcanon for what kind of drunks the Mane six would be has changed.
 
AJ= The hard drinker. She’d easily outlast anypony in a drinking contest. ‘nuff said
 
Dash= The stupid drinker. She’d like to believe that she’s can keep up with Applejack, but she refuses to acknowledge that she has a limit, and usually ends up like she is here.
 
Twilight= The lightweight. The strongest drink she’s probably ever drunk is coffee. She’d probably go down after less than five shots.
 
Rarity= The social drinker. She’s been around high society enough to know to pace herself. She’s knows her limit, and tries her darnedest to stay below it.
 
Pinkie= The wild drinker. Parties are her thing. She’d drink to keep the mood in high spirits, and I guarantee you that she has special drink recipes for each of her friends.
 
Fluttershy= The designated driver. She may have tried alcohol once and it didn’t agree with her. Her friends don’t try to force her to drink, since she’s the one most likely to make sure each of them gets back home.