I always liked to live in Johto, in Olivine City because of the Light House, Battle Tower, Steel-Type Gym and the Ship Port. I really like Jasmine too.
I live in Johto. In Goldenrod City, to be precise. I live in the plant house near the GYM. Closest to both the GYM and the Radio Tower. I enjoy my daily strolls to the GYM from dawn to dusk.