GMK Darling is my favorite set of 2020. It is inspired by the best girl from Darling in the FranXX, Zero Two.
The pink and red combo is vibrant and extremely eye pleasing. This shade of red is probably the best red I have seen on keycaps and it has great contrast with the soft pink.
Aside from the gorgeous colors, my favorite aspect of this set is the novelty set; I liked them so much I got two sets. The novelty set does a great job depicting Zero Two without having to worry about any legal issues.