The main reason I don't like urban travel is it takes so long to get to know a place. Having been abroad to study and work on a few occasions, that experience of actually becoming part of the city is so powerful that just visiting one seems unfulfilling. Also, urban environments are pretty stressful at the best of times IMO, and spending a week in a city just means I never get comfortable.

Now, nature travel... I loved touring the western USA. The country is just designed for road trips. What little interaction you do need to have with the local culture is made tremendously easy by how standardized the service sector seems to be. Too bad flying is so damaging to the environment, I'd love to go again.