Okay...your shelter and sleep system need to meet specific needs. What temp range will you experience? Are you a big guy capable of bottoming out most mattresses? Do you prefer floorless, a nest or the option to select either? Ever packed a stove? Ever try a hammock? Where and at what elevations will you be? Year 'round? Any serious weather? Snow? Extreme heat?
As far as temp range, it can get a bit colder than freezing in some of the areas I'm looking at (however, actually calling in freezing weather is still something I wanna be cautious about to start and would rather focus on squaring everything else away first). I'm not looking at blizzard or arctic type camping, just sometimes down to very cold.
I'm a pretty small dude, only 5'6".
As for floorless vs nest etc... I'm still learning a bit but given that I'm in the Pacific Northwest I think I'll want something with a nest given how it often rains here (even though it isn't necessarily pouring).
I just pack a cheap backpacking stove and fuel right now. Nothing for heating or anything like that.
Not tried a hammock.
Elevation varies, but the places that I just checked were between 1400' and 2000'. Certainly could go higher than that, but none of what I'm looking into at the moment seems to land outside of that range. All pnw.
I wouldn't expect snow or extreme heat often, however snow is definitely something I could encounter irregularly, but with more regularity as I go out with the intent to have more winter camping trips.
Most anything including just laying on the ground and going to sleep is comfortable here in the non-rainy summer, but when it comes to rain and wind that's the biggest struggles I've faced here. I also like to be able to look outside of my shelter a lot, so if I used either a tarp or my tent has some sort of awning to keep rain away from the doors/ bug mesh windows that's ideal for me.