I loved the Sim games when I was younger. One of the things that blew my mind the most was the Streets of Sim City game. You could take any of your cities from Sim City 2000, and turn it into a vehicular racing and combat playground.
I spent SO many hours on SimTower too, it's ridiculous.
I too remember how awesome Streets of Sim City and Sim Tower were. I also loved Sim Isle, which was a precursor to games like Tropico.
This made me want to abandon my plans and download and get lost in SimTower.
such nostalgia :) - screenshots from the original Window version i played as a kid.