Thanks for your response and the information about your program! I appreciate your suggestion to consider the program focus ('I' versus 'O') when narrowing down programs, and it sounds like you found a program that is a great fit for you.
I definitely lean more towards the 'O' side, as you put it, especially organizational climate/change... However, since I haven't had any I-O education (aside from the Landy & Conte textbook I am reading on my own), I find myself wondering if my interests would shift with formal education or experience (like they did during undergrad). I wish I had some experience with I-O specifically (e.g., classes, internships, etc.) because I think it'd help me clarify my interests a bit, but I am having difficulty digging up those kinds of opportunities. Did anything in particular help you narrow down your I-O interests?
I am not convinced HR is the route for me, although I am enjoying it; it was just the most accessible as far as gaining internship/practical experience in my area.