I've often thought about buying my husband his own glucose monitoring kit so we can eat the same things and compare results. (Though it would probably discourage me so wouldn't want to do it beyond a few days!)
Fasting glucose levels are often the last to rise as insulin resistance progresses from normal to pre-diabetes to type 2 diabetes. It's the pre-meal and 2-hour post meal readings that give us our first indication of developing insulin resistance, and it's what I'd be most interested in tracking.
Our son, who is 29, had a high triglyceride level last summer. Thinking about buying a glucose monitoring kit for him too.