I've found that C# grows on me faster than any other language I've used. At first I was very disappointed, saying it was just 9% better than Java. I was dismissive of the funny ways they use the new and override keywords until I understood they had addressed an important set of problems.
Having used it a while, I'd say it's very nice. Perhaps the best single advantage that C# has over Java, however, is that when it burst onto the public scene, it was much more complete than Java was for the first several years. Including libraries and documentation. It is of course completely unfair that the C# designers had years to use and study Delphi and Java and C++ before committing to a design for C#. So what!
The single best thing about C# may be that it works just as the documentations says it does. This alone is worth the price of admission (which is steep).