I checked in mostly to share some exciting news. Last year I had the opportunity to teach a sophomore/junior-level physics course on the foundations of QM, and then edited the weekly handouts I wrote for that course into book chapters. The book has just been published and is available, for example, here:

https://www.amazon.com/dp/3319658662/?tag=pfamazon01-20

The book covers everybody's favorite topics in the foundations of QM (the measurement problem, the ontology problem, EPR, the copenhagen interpretation, the pilot-wave theory, Bell's theorem, spontaneous collapse theory, and the many-worlds theory) and is designed to be uniquely accessible to undergraduate students with a pretty minimal prior exposure to quantum mechanics. It is intended to be unusually readable as textbooks go (and hence suitable for self-study and/or just reading for pure geeky pleasure) but also to provide a systematic and fairly balanced intro-textbook-like survey of the topics covered. (You can read the Preface and check out the TOC using the "Look Inside" feature at the link above to get a more detailed sense of the coverage and level.)

Anyway, I hope you'll check it out if you're at all interested. I'll be following this thread so that, if anybody has questions or comments you can post them here and I'll do my best to address/discuss. (I hope that makes this a genuine thread-starter rather than a mere shamelessly self-promoting advertisement!)