Little do we know, 4 was the number hated most of all.
678
It was Orphen for me. A mediocre show about a guy trying to save his dragon girlfriend. It wasn't that good, but I was young at the time and was pretty interested in this "new thing called anime". Well, I shouldn't say that was it, but it was part of the reason- it's how I found out anime was a thing.
But I did watch legitimately good shows back then. Azumanga Daioh, the amazing dub that is Those Who Hunt Elves, possibly Angelic Layer, Kare Kano...it was a good time. There was a lot of crap, too, but at the time I didn't really care.