The original Sim City, and the ones that followed, were always a good bit of fun. In fact, Sim City was one of my first PC games, so maybe it just has a little nastalga with me.
I'll be checking out the new one when it launches. I'm also liking the multiplayer idea (could be interesting imo).
As for Origin VS Steam; whatever. Both work nearly the same way when it comes to downloading games. I like steam's social aspects better then origin (I love the friends list, chatting, joining friend's games through the friends list, etc), but Origin works too, and it's not like you have to turn off steam to use origin. Just use Origin to DL the game and keep steam open to chat with friends and such. It's not the huge deal that everyone tries to make it out to be.