The most surprising thing I've learned is the disparity between the mining community and the bitcoin community.

If you go to a Bitcoin mining event, you'll rarely meet a Bitcoiner. If you go to a Bitcoiner event, you'll rarely meet Bitcoin miners. The separation of these two communities causes 'othering' in both directions, which is unhealthy, given our desire for Bitcoin to serve as our ledger of accounts for the next 1,000 years.