My fave is ANS4. Not only did I think the overall lineup was very strong, but it had some of my favorites of the whole ANS run. Additionally, and just as importantly, I liked the magnet and foil subsets of original series stickers. I didn't care for the gum (I believe that was the first ANS that had it. Or was it ANS5? I'm getting old. Well, if ANS4 didn't have it, that's just one more reason why I liked it), but that's a relatively small complaint. And as much as I still enjoy sketch cards, the overwhelming influx of so many subsets (particularly the colored borders which I dislike intensely) has been a real downturn in the wacky line, IMO.