I've been through 7 or 8 now. My first was terrifying, now I'm OK with it. Between AABB, TJC, FDA, FACT, DPH and any other acronym you can mention, I've been through a lot of inspections / surveys / assessments.
I do find AABB to be wildly inconsistent. I suppose that is part of the nature of peer assessors, but until this last assessment, we have always had an AABB employee as the lead. It really feels like they can't leave unless they find something. Rarely it's significant, often several small / trivial non-conformances, but never none. Our TJC and FDA are almost always without citations. FACT, we might get one small ding (they are ruthless if you've never had one). We've even had AABB, FDA and TJC in the same year. TJC = clean, FDA = clean, AABB = 20 non-conformances.