I have them all! I wish I had waited to buy some of though, because I spent the full retail price for them all. Kind of sad when I walk into a store and see them being sold for $4.00 now.
Got Isabelle (Spring and Winter versions), Digby (got two since he comes with Amiibo Festival bundle), Reese, K.K., Cyrus, Celeste, Mabel, Kicks and Blathers.
I've got K.K., Reese and Cyrus from the three-pack that I got on sale and I got Isabelle's Winter Outfit, Blathers and Digby also on sale. :') I like the amiibo quite a bit but I'm not always too thrilled about paying 15eur per piece for them. I'd love to eventually collect them all, not just the AC ones, but that's just a dream, I'm afraid.
I recently bought almost all of them because I saw they were on sale. One day I might finish my collection but I'm happy with the ones I got. I just need Lottie and Resetti and I'll be done.
I personally ordered Amiibo Festival to get the Isabelle and Digby amiibos, since it's cheaper than ordering their amiibos, even without the pack of cards, but I haven't bought any of the others yet. It'd be nice if someone here in Austria had a sale like the Toys 'R' Us one, then I would definitely get a few of them...