Since Wild World, which I got with my old pink DS for Christmas one year. I got bored of it after a while, and stopped playing until last summer, which is when I got New Leaf.
Since March of 2014, when I got NL, which was only because someone who I was sorta kinda friends with on Miiverse had it. I wasn't even interested before I got it, and wasn't that much after I did. The only reason I continued playing was because I wanted to see if it got better. After I unlocked Club Tortimer, I was hooked.
I also created a character on my brother's town in GCN years before that. His/her name was Oddish, and I don't remember a thing other than that and that I quitted playing after getting stuck on the working for Nook part.
In October of 2014, I deleted Oddish and created my current character, Patrick.
Since 2011 with City Folk being my first. I have since acquired every other Animal Crossing game released in North America, with Population Growing becoming my all-time favorite.
I've been playing since the GameCube version but I remember never really getting into that one. Same with city folk, I enjoy games like AC on a handheld so much more. Wild World and New Leaf are my favorites!