My sleeping preference:
• It has to be cold, I like to sleep only with shorts (my shirt and sandals near the side of the bed). Warm or freezing cold (below 30 F) makes it too difficult to sleep.
• I sleep on my side, which ever side happens to be darker. Any sort of light will interrupt my sleep, same with noise. It has to be quiet and pitch dark for me to fully sleep.
• I need to have a stuffed Cat plush or a Pokemon plush with me or otherwise I will have severe nightmares. Don't know why, I just do - even if the plush falls on the side of the bed I get nightmares. By nightmares I don't mean monsters or aliens, more of the things I'm scared of (such as witnessing/dying in a tsunami/earthquake/meteor,. Cats, mustelid, or Pokemon becoming extinct. My Grandma or other family member moving away or passing away)