Structural engineering would be cool! I know this sounds really weird but I never wanted to be an engineer at all. Why'd I get the degree then? I dunno, I guess I didn't really know what I wanted to do and I was pretty good with the maths and sciences so figured it'd be a good program to go through. I entered the construction field and like it, and am an estimator/project manager. Maybe one day I'll build something you design
If I were to ever do engineering I think structural would be what I'd want to do.