For me it's the cities - Novigrad of course and but also Oxenfurt. Ever since I saw the first glimpses of Novigrad I have been wanting to explorer that city in details; every street, every alley, every dark corner, every bar, every brothel, every shop, every warehouse, every church, every house and so on. I can still sit an watch clips of Novigrad (the first short one, the fly over and the one from the 35 min demo) and wonder if I can go up to the top of that tower there or there or that window high up in the three stories building and have a look out at the city. I really hope so as it will be a dream come through. And then on top of that follow and explorer the dynamic living breathing world of these cities - followring the NPCs and sse what they are up to. Oh I will spent hours in Novigrad and Oxenfurt I am sure.