I originally read this thread, but thought it was FIRE, not FI... So I am a little late to the party..
Some of the questions I personally would like to ask others are:
-How old were you when you became FI? 47 (am 49 now)
-Was this carefully planned or happened suddenly (inheritance/job payout)? This was very carefully planned and happened much faster thanks to the market
-What was the biggest surprise you didn't expect after FI? I did not expect me to be a two year OMY person...I was a coward!
-What was the most difficult adjustment? Making myself quit an awesome job to full time RV travel with my already FIREd DH.
-Do you tell people you are FI? Why or why not? I did not tell folks until closer to FIRE (1/27/17) We started telling family when we sold our residence last June and moved into my parent's horse pasture to wait out the last 6 months of me working. Work found out when I gave my notice on 1/3. So far everyone has been great about it. Most are jealous or cannot comprehend what I am doing, but they still respect it. I suppose had I retired and not had grand travel plans it would not have gone as well.
-Did your social life/friends change after FI? How? I am on a fixed income now and will be living out of state full time starting around March. I have still been attending some of my normal events as I prep to travel and I get to spend lots of time with family, but that will all change very shortly.