I'd probably learn all sorts about nanotechnology given I have a science background along with my development background and there is an emerging billion(trilli

I'd probably learn all sorts about nanotechnology given I have a science background along with my development background and there is an emerging billion(trillion?)-dollar market for nanotechnology. That said, strictly in the realm of development: After having done Python+Django, PHP, and .NET(c#), JavaScript, etc, I'd focus today on mobile or front-end development. Objective C and JavaScript. It is way more visible so it gets more praise from strangers and coworkers and the very nature of it means that you aren't usually working on legacy apps. I don't get happiness out of rewriting old enterprise code. Some might say they get joy out of fixing old problems, but I have had situations where 10 lines of legacy code were reduced to 1 with an increase and speed and I just felt sad, not happy. shrug