Regarding the question: which of the NROTC Battalions are the most popular:
I have read that it goes something like this:
1. all the Sr. Military Colleges, as they all have a Corps of Cadets and NROTC: VMI, Norwich , the Citadel, Texas A&M, Viginia Tech, and to a lesser extent North Georgia St.
2. expensive, prestigious Private Colleges in the USNWR top 100 but *not* in the Top 20. (Tulane, USC, Boston College, Boston U, Fordham, George Washington, University of San Diego) etc.
3. specialized technical private colleges: e.g. Embry Riddle Aeronautical University
4. Private Colleges in the USNWR Top 20 (e.g. Notre Dame, Vandy, Northwestern, Duke, Rice, MIT, Stanford, Ivies that have NROTC, etc.) These schools tend to have very generous financial aid, and many families can make the finances work without the NROTC scholarship.
5. prestigious State Universities (dollar value of scholarship is much less), e.g. UC Berkeley, UCLA, UVA, UNC, Georgia Tech,
6. not particularly prestigious State Universities or private universities/colleges that are cross-town affiliates of a Host Battalion