Professionally these technologies enable awesomeness for the programmers using them and in my opinion improve the world while they do it, whats not to like! :)
I love crossplatform development techniques and I'm glad I get to work on these things @ Tieto :)
Design, teamwork and iteration - when executed properly - can spawn outstanding products and I specialize in these three things as a developer. Continuous integration, test driven development with proper preproduction and ultra focused, limited iteration create awesome results.