Clerks

Clerks came out in 1994. I saw it at a second-run $1.50 theater with some college friends and was pretty much "eh" about it. And then I saw it again -- same theater different group of friends -- and it started to grow on me. Again and again. Each time I loved it more and more.
Then a handful of years passed and Kevin Smith got more and more popular and in 2000 ABC aired an animated version!
For two episodes.
That version has since made its way to dvd, Comedy Central, Cartoon Network, YouTube ... and my lunch (much easier to copy the animated than the original)!