Mine was Rowan, and when he moved out, he gave me a second picture. He's the only villager who's moved out and I'm still happy to see him on Main Street. :3
My first (and only, because I started resetting my town after that) villager pic was Soleil's. She asked me to get signatures for a petition and gave it to me as thanks when I presented to her the completed petition.
Merry. I was sitting there thinking "She should totally give me a pic for this" because I gave her a rare fish. Then she did and I was so happy :3 I love Merry!
Still awaiting my first villager picture... (I've never received one from a villager in ANY ac game. My luck is terrible when it comes to game, just like how I've never encountered a shiny Pokemon. I BUY AND FREQUENTLY PLAY EVERY PKMN GAME?!) :c
First picture in New Leaf is Kidd. He's given me two so far.
My only other picture I got in the other game (WW) was Filbert's picture! None in City Folk or the Gamecube version...