Why do you like fodder characters awesomeseimei? Just wondering.
I have no idea. All I do know is that it's always been this way. Maybe underdeveloped characters seem more mysterious to me or something.
In any case I always start coming up with my own stories for them, since their lack of canon development gives enough room for that.
Also, I never care about power levels or who beat who, so there's that. And I don't need much to start liking a character, a brief definition is usually enough for me to get a clear "image" of them.
Lastly, I don't like things that I hear about a lot. Just like I can start hating a song that I used to like if the radio plays it too often. So this might be related to why I can never like popular characters.
Edit: also, it's not like all of my faves are fodders power-wise, but they are always supporting ones.