From my perspective its missing a lot of features and the culture of 'Go is perfect, features are bad!' is a real turn off. C# is one of those multi-paradigm languages so you can usually write things however you want and I like that.

A lot of the features that do exist seem to have some strange quirks. Package/dependency management comes to mind but maybe its just unfamiliar to me.

Fundamental channels and goroutines is really nice though.