What's missing?

Do you ever finish a card but still have the feeling that it's missing something or something is just not quite right? I made this card a couple of days ago but wasn't completely happy with the way it turned out. I felt something was wrong with it, but I couldn't quite decide what it was. I thought if I sat it aside for a couple of days and then looked at it again I'd be able to figure out what it was. (This usually works.) I looked at it again today. I think it's the word "Merci". It's too small(?) I think I'll take another stab at it today.