> Mono is awesome but it's not perfect by any means.

If by perfect, you mean doesn't implement whole of .net, then yes. For me, this is good enough http://www.mono-project.com/Compatibility I am not looking to play catch-up with MS's implementation(good to see mono mentioned WPF as no plans to implement)

What I don't like about .net in general is it's still catching up on package and dependency management.