I like that #1 fits to comical coplay-y costumes.
Attached to #2 'cause it's my mayor's face in my special town Lumina.
#3 is the face my buddy used to use often. When we resetted this town, I even made a new town to make a character to have this face.
#5 is my main town mayor's face and #8 is just my taste.
My mayor has face #1, my male side character has face #8, and my female side character has face #10. I also really like female face #5 because she looks vintage Animal Crossing to me. It's like the iconic face, in my opinion.
Update: I've decided on #11 for my character's face when Animal Crossing is released on the Switch. It's really, really grown on me. I like the daydreaming expression she has; it looks like she's looking at a loved one.
I've been using #6 since my very first WW town when I didn't know the starting questions determined your face. It's my face. If I use another face, it just doesn't feel like me.
I do also like #3 though.
My favorite Female face is 12, because I like that the eyes are actually pointed forward instead of off to the side.
I also happen to like faces 1, 2, 4, and 6 for the girl villagers.
My favorite Male villager face is 2, for the same reason that I like Female 12. This also means I like Male face 12, just to a lesser degree than 2. 1 is pretty all right too. That said, all but one of my characters are girls, so, whatever.