Go to Spain. We went to Barcelona, Madrid, Toledo, Granada and Malaga a couple years ago. It's cheap, the food is amazing, the people are super friendly and did I mention how cheap it is?
I also love The Netherlands (Amsterdam is cool, particularly de Pijp, I really dig Haarlem and then spending time with family friends in Friesland) and Belgium.
Do London and then come to the Netherlands and visit Amsterdam and a bunch of other really cool places.
So I'm booking things and I'm thinking about doing something like:
4 days in London (3 in the main city, 1 day trip in York)
3 days in Amsterdam (day trip to Bruge or Brussels if there's not 3 days of stuff to see)
4 days in Paris (2 days in the main city, 1 day in Versailles)
Looking around here's all the stuff if I had unlimited time and not just 11 days that I want to see:
-Edenburgh (castle)
-York (museum and ruins and stuff)
-Bath (old bath ruins)
-London (Tower of London, British Museum, House of Parliment, Westminster Abbey)
-West Ireland (Cliffs of Mother, Kylemore Abbey)
-Paris (Louvre, dunno what else)
-Versailles (palace)
-Mont St. Michael (fucking cool island place, but would eat up 2 days of Paris to see leisurely)
-Bruge (old monestary stuff)
-Amsterdam (scenic canals and stuff)
I also don't want to be always moving high pace, only get 1 day to barely glimpse a city. But I don't think I want to just hang in London/Paris for 5/6 days each and call it a day. That's why I'm thinking like 3 cities of 3-4 days each would be good and give time to do day-trips or not do day-trips depending on how it goes. If there's tons to do maybe I finish the trip only having seen London, Amsterdam, Paris and nothing else. But that's still probably pretty good stuff to see in < 2 weeks.
The hipster in me and person who hates crowds in me does want to go somewhere more obscure than just 3 big cities. Was originally thinking of doing a couple nights in York for something more chill. But seems like I can just do York as a day-trip and lose less time so hmmm.