I love H, and I mean it - not only acceptable but even pleasing to me, quite surprising to say. A and B stayed too long in the sun, C indeed is PowerPoint heaven, D is fun but in a circus entry ticket way, E reminds me of a school book and not in the good way, F ouch my eyes too much going on, G okayish but doesn't feel like a banknote but rather... flyers? I - spilled its colors in a watercolor cleaning water way, and finally J is too photo-realistic to look banknote-ish to me.

PS you can even vote for them! https://surveys.ecb.europa.eu/10b/neweuro/