Every European (and I guess non-Europeans as well) can vote what our next Euro design will be: https://surveys.ecb.europa.eu/10b/neweuro/
About ten different designs are available and about half of them feature birds instead of boring people.
I really like the bird designs as they symbolise freedom without borders. Hope one of them gets chosen in the end.
I like that the bank is more valuable than the commission and the parliament.
I think the reasoning is probably opposite to that, because there are more of the smaller notes in circulation. So you’ll probably see multiple 5€ every day, but you’ll rarely see a 200€ unless you work in banking or organized crime. I also vaguely remember a survey from years back that showed that the 5€ note is the most popular one.