[TeMPOraL]

N=1, I sleep better on stimulants than off them. No problem falling asleep after drinking coffee (usually it makes me more sleepy), or even taking a prescribed stimulant before going to bed.

[qup]

I fall asleep halfway through an energy drink with surprising regularity.

In my youth, I would pound a mountain dew before bed.

[piperswe]

Some of my best naps have been after taking amphetamines. My brain shuts up, and I can actually relax.

[atcalan]

There is actual research on this. So n>>1.

[intelVISA]

Same, coffee is quite sedating.