Hi, I am a BSN completion (and subsequent MSN) "survivor".
The thing I will always remember when I went through (which was in the 80's, finishing in 1990. I worked fulltime, attended part time and did it 7 years--) was that it was really hard for all of us, be we diploma (as I am) or ADN, to admit that "something" was lacking and we wanted and needed the BSN. We were actually conflicted to be there, ambivalent, angry, defensive and I remember one teacher who was very matter of fact but allowed us to vent some of that so we could get on with the business of getting our degrees. Do RN to BSN students still feel that way?
I loved all my pre-reqs. That was almost fun and they did enrich my nursing practice. Probably the pre-reqs that I enjoyed the most and USE the most now are: Human Sexuality, an elective called Psychology of Health and Illness and Introduction to Anthropology. The way that pre-reqs enhanced my nursing practice convinced me of the wisdom of using the BSN as the entry level of practice because though I had been a very adequate nurse before my BSN, I believe my BSN course work helped me see the complexity of the human situations involved in nursing much better, which is a function of time and exposure to information.
Learning to think in a theoretical framework about nursing was the most challenging, because it seemed so frou-frou or extraneous. When I went to my BSN program, many BSN programs adopted a main theorist and used it as a foundation for teaching nursing and Wichita State's was Dorothea Orem. She seemed to have a hundred ways to state the obvious. But over time, I realized that Orem helped me to see nursing care situations in a new way and helped me perceive different ways of helping. Again, hard to capture what it is was that was learned, but it feels different and has changed my practice.
I salute you for doing the rigorous work of the BSN completion. Good luck.