Thanks, Xarqin.
Yes, I have considered this issue and pondered about it for quite some time. It is tempting to have a clear path ahead since I can easily expand on my current project, but I certainly don't want to specialize in one thing this early and carry it on for the rest of my life. I actually worked with other PIs in the chem, bio, and engineering departments this summer. Sadly, everything is just in the same bubble (the engineering guys got the better gadgets though!). Perhaps this should be my safety school. Like many here, I have great doubts about my credentials and where they will take me.