CO Elite since 2005 in my early 20s until the end of CO, with various shades of plastic. UA 1K since 2013 - pretty sure got it with a a status challenge initially (maybe from AS?)
Kept it throughout the years without much effort, especially when foreigners were exempt from $. Never actually spent the required $ (thanks bulk tickets and generous premium partner earnings) - but maintained 1K since. Reached MM last year, appreciating the increased freedom this year to choose who we want to fly, and will not requalify again

Not a single work flight ever, just like to travel.

Dabbled throughout the years in AA EXP, BA Gold, AS75, BMI Gold and some others, but those were all just mistresses on the side.
Having AC status made me feel extra dirty during covid.