Fossil Egg is my favorite by far and I am glad that it was easily available compared to the others. I think I only earn 3 or 4 egg currency myself so, that was important to me lol.
I also like the Spring Bloom Egg which really does look like cabbage/lettuce, which is why I find it appealing.
And I also like the Paradise Planning Egg which looks like a maple leaf and really autumn-y.
Hopefully these will be released again in the future to allow more possibilities for line-ups. I low key want to get a Spring Bloom Egg on either side of a rabbit type collectible. I also hope that in the future we will have more fruit and veggie inspired collectibles.
I adore the splat egg - love me some colourful collectibles and pink & green is a great colour combo. It's probably my #3 favourite egg overall (from all years).