If I am at home, the i3 is always plugged in, either charging or waiting for "time of use" period to start charging. Our electricity provider has the least expensive rate between midnight and 3pm, so the charging is limited to that time.
I use roughly 30% of the capacity of our 2017 Rex on my daily 50 mile round trip commute as I have learned the most efficient routes plus it's nearly always heavily congested. It's extremely consistent at using up about 30% of charge, and estimating roughly 150 miles of range on battery alone. I really can't complain. Not worried about charging it to the "top" all the time either as BMW has worked in a buffer both at the top and at the bottom, not allowing access to either far end of the battery capacity.
Current daily driver: 2017 BMW i3 Rex
Past car history: Nearly a dozen 85-89 Toyota MR2s including 88 Supercharged, 96 Lexus SC300, 05 Tacoma 4x4 manual, 11 Golf TDI, 01 Honda Insight manual