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.
Not most of them, all had buildings, and it’s always the same buildings, too. The buildings are those of the seven official institutions of the EU.
Personally, once I figured that out (and it took me a minute), I much preferred the buildings to the seemingly random scenes on the backs of designs with the famous people. One of the designs also shows the names of the institutions (and birds), which I particularly liked.
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.