All this talk of graphs, time in range and percentages is very informative.
Personally I use a Dexcom and I use the 24 hr feature, basically I can look back over the previous day and that’s it.
Range is currently set 4.1 low and 9.1 high. Originally I had high set at 11.1 and then 10.1 but wanted to see if a better HbA1C could be achieved by setting the target lower ( yes it was ) .
If I stay within my range, I’m happy in that moment. Obviously I go out of range and depending on the circumstances I’m either frustrated, annoyed, guilty, baffled.
For me it’s more of how I’m feeling in life and not what data might be telling me.
I know where my HbA1C is going to be at check up time, not because I have data to make a judgment but because I know how I’ve been feeling over the past weeks and months. Well being and happiness for me comes from many places. The diabetes bit is mainly down to not having to put to much effort in to hitting my targets. I know that when HbA1C time comes if I’m feeling good, confident and happy that will be reflected in my HbA1C
Am I too carefree? Maybe.
Does it work for me? So far so good

For all those who do it differently I have total and full admiration for you, especially those who collect and analysis the data.
I wish I could ( I have tried) but it all just becomes a bit of a blur when I start going back over it.