Over-knee boots still don't excite me or draw my interest.  Most of them just don't look all that exciting or lovely to me.  Flat and low-heel over-knee boots are terrible.  I am sorry... no matter how much some try to make such boots fashionable, the greater majority of these boots just will have the same appeal to me as gladiator sandals, and even I would take some gladiator sandals over almost any over-knee boots though I mostly loathe both.
Wow... I even shown dislike for these boots back in 2011 looking back at past comments to this thread.  Some things don't change, I guess.