Hong Kong is beautiful, and I'm happy to see him as he's in my Hetalia Top 5. Aside from the visual quality, what I really like about your pictures is how they're always character exploration pieces (and god knows Hong Kong in particular can use a lot of character exploration). The smell of poppies and the elaborate room full of bird cages really resonate perfectly with my idea of the character, aside from being wonderful images in their own right.
I really like your evil UK. Fanart exists to explore the characters' dark pasts, after all.

By the way, I'm colouring the first picture for my own enjoyment (Hong Kong's pretty face and the poppies kept haunting me) - would you mind if I posted it to the community?