Around about.. Gosh, 7 years ago, now? I found a sudden liking for characters of an anthropomorphic nature, particularly dragons. I eventually found other individuals with the same feeling, and got introduced to the fandom through it's music and artwork. It's only developed from there, I suppose.
I've gone through about three or four fursonas now, over that time, and I've sort of drifted in and out of the fandom, but I've always been around it, regardless.