Heavy

In the middle maybe

A light sleeper, I can't sleep with noise and my room should be pitch black.
I also wake up immediately if I hear a noise.

Heavy

Light, i can even tell to myself when to wake up and it's quite accurate

This is literally me.

https://vine.co/v/h2XdXZvZgI7

Heavy. Smoke alarms, vacuum cleaners, blenders, people helping themselves to things in my room...
Nothing can get me up until I decide to rise.

Same! Even in the winter I have the fan going just to get to sleep. It also can't be pitch black otherwise I'm distracted by trying to guess where everything in my room is.

Heavy. There could be some huge explosion outside and I tinamou wouldn't notice

That's exactly me!

Heavy, but my body clock knows when I should wake up, that's the only time I wake up.

Really heavy. I can sleep through anything like thunderstorms, vacuums, and people in my house. One time my family was camping up in Yellowstone and I slept through a ****ing earthquake. I'm screwed if a robber or something comes into my house. I have to set up a series of alarms in the morning. Waking up is a huge struggle. I'd rather be a light sleeper tbh.

'Wasn't too serious'

Our water system burst and flooded the entire first floor including my room. Mum lifted me up and took me upstairs to her room. I was so confused when I woke up the next morning and saw the swimming pool downstairs. Slept through it all

When I'm sick I need background noise. Like the TV down low or something. It's comforting for some bizarre reason

Heavy sleeper now. I was a light sleeper before.

I don't know.

It takes me really long to fall asleep (sometimes hours), but once I'm asleep, noises don't wake me. I do wake up sometimes to go to the bathroom.