I think the first question you need to ask, is what is it exactly that you are interested in? Hone in on what that interest is and you'll find that there are more options available to you. For example, I've known for a while that one of my key interests is in the interaction between systems and between people, and so no matter what position I've held or what project I've worked on it's had something to do with this facet of technology, and I've always enjoyed myself.