I liked it pretty much from the start but I had been reading sheldon's articles and lurking here for a while getting excited about it before I purchased one. My first couple rides were kind of awkward until I got smoother with applying backpressure and whatnot but I think I always enjoyed riding fixed.
I know it's shocking that Sheldon Brown was correct about something bike related?! [That everyone should at least _try_ riding fixed gear at least once.]