wow I'm impressed. You guys are quick!

Thanks for the clarification about points and booking.com

I understand that "Europe" doesn't mean anything specific BUT we actually decide 20-30 days before our depart and the destination can be Paris, Vienna, Oslo, London or whatever we want to visit. So my question now is: which is the best program with the most sparse hotel coverage?

Hilton and Marriotts are great hotel for Business, but I prefer to stay at Le Méridien with my GF I'm not sure why but actually is a way more romantic.

As a side note:
I'm Hon with MM and the only benefit I use is the award flight / upgrade class with miles. Don't get me wrong but I don't need all the side things you have with Hon status. For long haul flight business class is more than enough, I fly first just because my company pay for this. So my expectation from hotel loyalty program is free nights / better room but preferred check-in lane and other things are not for me.

AS SAID: don't get me wrong, if you are Hon, Diamond or whatever and you use all the benefits you get from that status well... better for you