As I've explained elsewhere, I still use R for high-protein meals because it matches up better than anything else. But I'm inexpressibly grateful that I never had to use a whole list of things, and NPH is definitely one of them—along with urine strips, boilable syringes and sharpenable needles, the infamous "guillotine", etc., etc.
My only surviving OCD behavior (I think) is cleaning the needle of the syringe with alcohol right after each use. I reuse syringes because of cost, and when a previously-used needle is reinserted into a vial, I don't want any old, stale insulin clinging to the outside of the needle and potentially contaminating the new, fresh insulin in the vial. So far it's working; I haven't had a vial go bad, yet (knock wood).
Indeed. And a similar mindset leads some (not all) HCPs to label any diabetic with less-than-good control as "non compliant". Since many HCPs firmly believe that achieving good control is cut and dried and will work for anyone if they just follow the recipe—not their fault, it's what they were taught in school—it logically follows that anyone who doesn't have good numbers must be failing to follow instructions.