Personally I love the memory foam, harder pillow from IKEA I got for £15. It's so comfortable that other pillows feel like shit compared to it. It's not for everyone though
I went and tried the Purple Harmony pillow when there was a similar thread on Reddit ~1 year ago. It was fantastic! I wanted it sooo bad, but it was just too expensive. I did find out later that Purple runs sales a few times a year. Think the best was around Christmas and it was damn near 50% off. So, I've had it since Christmas and been very happy.
Use https://www.sleeplikethedead.com/ to look up what works best for you. I went with latex pillows ten years ago and they're still going strong, though starting to smell like latex recently. Probably time to replace them ...
I'm on the buckwheat train. Tried different pillows and ended up with buckwheat. The pillow allows you to mold the shape to an extent which makes it extremely flexible. They also come in different sizes and good pillow sellers will either overstuff them or give you a bag with extra stuffing. You can open the pillow up (via zipper usually) to remove and add more buckwheat for even more customization. It's just extremely flexible overall.
Jumping on the buckwheat train. I was terrible at pushing all my pillows into the bedhead and waking up with a bent neck before picking up one of these. Another benefit is they don't get uncomfortably warm. It's really nice that I can wriggle to flatten it out for back sleeping, or fluff it up to the perfect height for side sleeping.
Side sleeper here. I put one thin one between my legs so they are parallel and the joints don't press against each other. I have a thick "hugger" so my top arm doesn't just hang unsupported and pull on my back muscles all night. The problem is my lower arm gets pressed on all night or I have to find the magic position for it that is comfortable.
Back sleeping means I have to get the neck just right but then I usually snore and I get wacked by my wife.
Life pro tip for side sleepers who need a super thick / fluffy pillow:
Buy a king sized pillow and put it in a normal sized pillow case that has one of those little flaps at the open end. The extra stuffing compressed to a normal sized pillow makes for the best thick pillow.
Same. Hotel pillows are too thick for the head/neck. There should be 2 different pillows, a thick and firm one for hugging, and a thinner and softer one for the head.
Wait are you being for real? That can't be good for your neck. I've fallen asleep like that 1 time when i got way too high on the zaza and i had the worst neck pain ever.
Haven't used a pillow in five years. Your spine is meant to be straight at night, so no pillow is the way to go. It is also helpful if you have breathing issues.
I find sleeping on my recliner actually feels the best because my head is kept aligned with my spine better. I've read that in the old days (like 1700s and such) they slept sitting almost upright.
You need to find the right pillow. This is important for good quality sleep. For instance I know that i need a thin pillow if I am on a soft bed but a thicker pillow if I am on a firm bed.
I use a Costco memory foam on top of a really thin shitty feather pillow I've had forever. The memory foam is like a cm or two too short for my neck to be comfortable so the feather pillow is used to lift it up that extra bit.
I use small pillows, sort of like the end pillow on a sofa, about the size of a shoebox maybe. It's all the support I really need and it's small enough to be able to shift it around easily into whatever shape or position you need. Give that a shot.