" I am trying to decide between pass-throughs, C-Corps, and Consulting/research/writing."
Personally, our take is to remember some of the people that recruited you. If you felt like you would enjoy working with a particular person that you met during that process, start there. Shoot them an email asking them about the practice that they work in, what the work is like, what are the pros, cons, etc. Chances are they've spent time in other practices, so you ask for their opinion on those as well.
Since there are plenty of seasoned Big 4 tax gurus out there, help the soon-to-be new associate out. Advice along the lines of, "You're screwed, they all suck," and "Stay in school as long as you can, the real world is a bitch," while grounded in some truth, is not what your future associates are requesting.