Got this old buck near Oxborough, England. It reminded me of whitetail kind of habitat. Grass fields between flat, forested areas. I am not sure how rugged of terrain they can live in but they flourish in easier, forested habitat. I took a cull doe too. This property was very carefully managed as most properties are in England, so the hunting wasn't hard by any means, though they are absolutely wild, free ranging critters. The nice thing about roe is that they're hard horned in spring, and (in England at least) the season opens April 1, so you don't have to take time during the normal hunting season here in the states, to hunt them over there.
[Linked Image from i.imgur.com]

I have also seen them in western Spain, where I have been told they grow really big. They were in more hilly habitat there, but nothing too crazy. I have a few more things I want to kill first but someday I plan to hunt these in the Scottish highlands.