Have fun.
I'm the same way about sleeping on planes. I have good hearing and I'm a light sleeper, so if I do doze off, someone on the plane will cough or walk to the bathroom. And I'm awake again.
The only time in recorded history that I actually slept on a plane was the time we came back from Cozumel and went straight to the hospital for a 4 day admit. I was septic with dengue fever. After being treated in the ER, I went upstairs with a BP of 70, HR of 140, and a temp of 105F.
Helpful hint: don't ever get dengue fever. It sucks.