I also wanted to point out something important- some time ago, I am not sure where, propably on tumblr, I saw a beautiful picture with america as a kid. The colors on that picture were so good choosen that I remembered them and as I finished this pic today, I realised I included similiar colors. I didn't do it on purpose and I hope that artist won't kill me xD if you'll accidentaly find this picture feel free to contact with me and i'll put here credits.
America is really funny to watch. Hmmm you know I don't know. So many characters are cool to watch. I have my fave fan-made couples of course (many of them! ) but as for a single character... probably Germany because he makes me laugh and I like the way he interacts around Italy.