Music #1 - Miku! The light blue color of the sig definitely complements her style in the picture.
Digimon #1 - lol Digimon, it's been forever. I've never been a fan of the #2 art style
I like #1 cause it's smooth and clear.
SSB #2 - The cartoon style is definitely good for Ness
And the text looks like a kid style so that complements the picture (if that makes sense o_o )