I’m a huge knockoutjs fan, as I find it solves many issues in the sites I’ve built - although I don’t limit myself to one approach – you’ll see me fiddling around with other frameworks such as Backbone or EmberJs. You’ll find some of my ‘samples’ and experiments out on my github site.
I have used C# /.NET since it was in beta – started with webforms, but quickly fell in love with asp.net mvc (I was moving quickly to Monorail before this). Although I’ve primarily worked in .net – mostly due to my customers, I have experience with Grails and Rails. Additionally, on the side, I love playing with all kinds of technologies – for example, I’m enthralled with NodeJS and MongoDB, etc… just looking for a good chance to use it :) Also, I am a rather big Apple advocate, I love Macs and I love iOS. When I’m not messing around with web applications, I dig into learning iPad development with Objective-C.