Ecruteak City all the way. Firstly because there are so many legendas surrounding it, and it was once the home to Lugia and Ho-Oh, and secondly because Morty lives there, and he's really awesome. <3 It's also a much smaller, quiter town than Goldenrod, but nearby so getting there would be easy. I've always imagined the Ecruteak-Goldenrod area to be thevery center of Johto.
If not from one of the traditiona Gameboy games, then Phenac City. It's absolutely beautiful there; an oasis with awesome fountains and one of the few decent places in Orre. I quite like it and Agate, though despite the stone/tomb there, it's probably a bit too dull for me. I'd like to reire there, though. :P
The reason I don't want to be in a city with a psychic Gym is that first of all, I have absolutely no respect for Tate and Liza, and while I LOVE Sabrina, not only would I be nervous about her going on a rampage or something (see the animé on than one XP) but Saffron City is just too...big and busy for me. I don't really like big and busy.
~Psychic