Amounts of adipose tissue is just one factor of metabolic health. Fboab and I were discussing this in the car this morning - there are an estimated six million Americans who have a "normal" level of fat, but still have metabolic syndrome, and there are an estimated thirty million Americans who are obese, but don't have any other metabolic issues.
Metabolic syndrome is the key here, which is why it's important not to fixate on weight, long term. Weight per-se is only worth bothering about in absolute terms if it affects you directly - for example, if you want to get a tandem up some Irish mountains in June.
I like to measure other parameters that are indicators of my metabolic health (like fboab, I'm a data geek - though I'm less into spreadsheets) such as waist measurement, blood pressure, blood glucose (as I can't do HbA1c at home) as well as BF%.