If you played SimCity to create the perfect city, there's still nothing with a similar engaging dynamic.
BUT, if you played it like a city-painter, I recommend Cities: Skylines as an evolution. You can also mod it and the language of choice is C#. Just look at the mods, the community is (was?) amazing.
C:S is great if you want to plan a city, but its simulation elements are sorely lacking. I'd love to see the original design doc for SC2013 (fully agent-based, with histories) get made; that'd probably be the best you can get for a simulation engine.
