Hi,
I stopped taking insulin for a few years, just survived on a few units of background when I felt ill, and would not recommend it.
3 years since then, I'm only 26 and have retinopathy, kidney problems, loss of feeling in my left leg and various other things. Even though I felt ok at the time and my sugars were 6-9 most times.
It's basic science that we need the insulin for far more than just the BG reading and as diabetics I think a lot of us take a good BG as a sign that we are well overall.
Check with your nurse and if you truly do feel well with no insulin or ketones, ask to have yourself tested for MODY diabetes, you never know....