The Something Awful Let's Players thread was the first thread I viewed and got me vaguely interested in the farms mostly to keep track of a couple cows. It was Null's live streams and the cows they introduced me to that made me a dedicated lurker though.
Like a lot of people here, pretty much Chris-Chan is what got me interested in Kiwi Farms in the first place.
It's only recently as I write this that I even bothered to create an account and comment here and I really enjoy interacting with the community here and it's a lot of fun so far.
i remember coming across kiwifarms and browsing a few times years ago but i fully forgot what cow/topic it was because of, might have been something off tumblr. but the cow that actually got me to register was sargon of akkad when his slapfights with metokur were taking place.
Reneeisdetermined is the one I initially found this site from, since she used to constantly expose screenshots of the website and I got really curious. Her thread hasn't had many updates though lately since she's been less of a lolcow.