Try to get to Greece. You can take a ferry from Bari, Italy which is only 2 hours from Venice. I liked greece the most. Last year I went to London, Paris, Barcelona, Ibiza, Nice, Venice, Rome, Mykonos then Athens. Mykonos is a must.

 

I don't think I'll be able to make it that far south. Plus I heard everybody's going to Greece and Spain this summer, so I might have to avoid Spain as well. Ah, still planning out my itinerary...