Heh, it's been a while, Pity.
Johto had the best usage of time. They would have certain activities on certain days, certain items available to be handed out (i.e. Tuscany of Tuesday would hand out a free item, don't remember which) on certain days of the week, and most importantly, Pok�mon appearances were first being separated into times.
Johto also had the coolest story line. You could travel around Johto
and Kanto--three years into the future, when everything's changed. It's so fun; you can even collect their Gym Leaders' badges!
Shall I go on...?