I have one field that I am really interested and currently investing in. But it is so difficult to get relevant job, because there are barely few companies that do it. Most of it are gaming companies!
For example, the product I'm working on a product for real time architectural visualization, but at it's core it's very much like a true game engine with pretty much the same techniques for graphics, input, physics, sound... Since we're selling to customers in AEC and related industries, we're on a steady development schedule and the pay is good.