I used to have to many jocks but now I have one of each type of personality because in my opinion is adds more variety in dialog so two characters don't sound the same. But this is my opinion.
I have one of each type of personality, maybe two, because that's how I planned it for my town. I can't recall a time when I wanted to have a town without a certain personality.
I am currently cranky-less and it is completely the game's fault. I have never had wireless internet, so I am sure of this.
There was a six day period over Easter when I couldn't play at all on account of I chose not to bring my 3DS within 100km of my severely disabled brother. Chow decided to move out in those six days (possibly because he noticed everyone who talked to me about moving got told they weren't going anywhere), and the game decided to replace him with another Uchi, Tammy. Around the same time I also invited the first camper who showed interest into moving to my town. Molly turned out to be a normal.
Also, if the game had it's way I'd also be Snooty-less. Baabara has tried to leave seven times now. The next highest is Merry, at two. But now I know that a) most PWPs are only requested by certain personality types; and b) Snootys request the Hot Spring, Baabara is not going anywhere.