i think i've literally only collected on entire villager picture in acnl from a villager i didn't even like very much. i think i obtained a few in wild world but that was a looong time ago so my memory is pretty sketchy.
I think in my Wild World game I had like 3, in New Leaf it's 0.
I don't really care for the picture, but I really want a better relationship with my villagers, for random letters. x3
without April Fools day: 11. all my villagers except for marshal, doubles of a couple. I don't know why marshal won't give me his pic ): I've had villagers that moved in after him give me theirs lol
2. One from Bianca who used to be my bestie (then chow moved in) and the other from Kyle.... who continuously flirted with me and when he finally left he gave me his picture... I sadly have it next to Bianca's in my storage room style basement
In 2 1/2 years, with 5 copies (2 Japanese), cycling towns, cheat towns, whatever you call it, not even half! I've got about 60, but they take time, even the cheat with April 1, you've got to put in some serious hours playing to get them all, unless you trade some for some.
11, with one double. I really hate doubles because I feel obliged to keep them, but then they use up one precious storage space. So... I usually give them to my storage to keep it xD
I've gotten pictures from about 10 villagers. Some of them were only when the villager moved out (Bianca, Graham, Nan), and some villagers I've gotten about six pictures of (calm down Tammy and Kabuki). I haven't done April Fools ever, but I give them lots of perfect fruit and customized furniture, which works well