Past villagers in order they moved out:
1. Rodney - I liked him, he was one of my favorite villagers when he was living in my town. But it seemed like he didn't want to be there, because he kept asking to move out, and so out of frustration I let him leave. If I had known about villager pics beforehand, I would've kept him around longer.
2. Bill - He was cool. But I started liking Goose more when he moved in and paid less attention to Bill.
3. Midge - Wasn't really too attached to her. Really just kept her around to get her pic.
4. Sylvia - She was okay. I kinda liked her. She served her purpose as the town uchi. Unfortunately I had to sacrifice her to make room for my dreamie Eugene because Colton had the nerve to take up a spot in my town and then I had to use my last spot to hold Curt for my friend.
5. Miranda - She was my favorite of the female villagers. Mostly because I like snooties more than the other female personalities. I sacrificed her because I wanted a new uchi and Colton just refuses to leave my town

.
6. Prince - Prince was another favorite villager of mine, though I will admit I began to favor Stitches more than him once I got past my initial dislike of Stitches. I would've kept him around, but I found myself wanting a new snooty in town and since Colton JUST WILL NOT LEAVE

, I had to sacrifice him to get another snooty.
7. Merengue - I remember being so pissed when she came into my town via StreetPass. I did not want two Normals in my town. She was okay once Midge left, but I'm glad she's not around anymore. Didn't like her design too much.
I personally can't wait for Colton to GET OUT. I will be doing Shrunk Funk Shuffles all day when he leaves. I also curse my friend sometimes for wanting his own Eugene instead of leaving a spot open for Curt in his town.
EDIT: Almost forgot Merengue moved out today.