What I'm doing now for work is IT help desk at a technology manufacturing firm. (They don't make consumer products or anything you'd be likely to see the company's brand name on; mostly it's semiconductors and radio equipment.) My first order of business is to get signed up for some community college courses that will directly help me at work: CS and particularly CIS courses like Microsoft Operating Systems, Server Administration, and that sort of thing.
I don't really have that strong an interest in computer technology per se - my interests tend to be more directly sciencey. Mathematics, physics, engineering.
Deep down, I've always wanted to know, "How does it work?" Not "How does it work, what button do I push?", but "How does it WORK? What makes it go?"
But the fact remains, you do need to know what button to push. And I can tell you from experience that there are a lot of engineers out there who HAVEN'T GOT A CLUE what button to push - and that's why I have a job.
So, math and physics down the road. But for now, computer technology.