Ahh, man. This is a tough question. I know I wouldn't live in Hoenn and Sinnoh, but the other three I have to think about.
-Johto, for a lot of the reasons you just stated, Gallows. Plus, it's always been my favorite region out of all the games. I think Ecruteak city would be the one I'd like to live in the most! It's such a beautiful town. Especially in some of the artwork. I'm a sucker for trees in their fall shades and this beautiful piece of artwork on Bulbapedia just shows how beautiful the town really is:
http://cdn.bulbagarden.net/upload/a/a4/Ecruteak_City_Landscape.png
-Kanto because it's the region I'm most familiar with and know the most about. It doesn't have as many neat places as Johto though, but that region is just a quick trip away! If I lived here, I'd like my hometown to be Viridian City. Viridian It's close to the Viridian forest, and I love natural places like that (And has nothing to do with Giovanni. Nope. Not at all.).
-I like how unique Unova is, and I love it's pokemon. So it's got at least a 'maybe' from me. If I could live here, I'd want to live in Striaton City. I really love the area around it, and it's a short walk to Nacrene city and the Pinwheel Forest. This one is my favorite because of that beautiful fountain area as well as being close to the Dream Yard. (Also the Striaton Gym is awesome~)