Insomnia Support Group
Insomnia is a symptom, rather than a disease, and is characterized by inadequate quantity or quality of sleep. People with insomnia complain of difficulty falling or staying asleep, which results in significant impairment of daytime functioning. Insomnia is categorized as transient (shorter than one week), short-term (one to three weeks) or chronic (longer than three...
So if you can "take advantage" of your sleeplessness with more positive functioning wake time as you describe, this suggests you aren't experiencing significant adverse affects. More power to you.
But maybe you don't have insomnia. Maybe you just need less sleep than you think you need.
there's only 24 hours in a day, so if you're not sleeping well, what did you do?