Originally an ASP.NET (C#) web developer, I have been working in ASP.NET MVC since the early previews in 2007. Before this, I was investigating the use of Castle MonoRail as a .NET implementation of the MVC architecture.
For over a year, my .NET skills were blunted by the necessity of working almost exclusively in ColdFusion. Still, it gave me chance to get to know MVC (implemented in CF via Mach II). When ASP.NET MVC came out, I felt I had a good advantage, and had a stronger knowledge than if I had continued using webforms. I believe that now though, my strengths lie more in the architectural pattern rather than C# itself.
I'm more often found on StackOverflow, helping out with questions, or on Github where I contribute to several projects in one form (raising/fixing bugs) or another (implementing architectural changes or being the project owner).