Now that's a loaded question!
I have many tents, some I got for free, some I bought! The ones that got the most use are mainly Colemans. I don't backpack, so it's all "car camping", usually at the Cornerstone Fest. They are all Nylon & listed below in size and field use results.
2 Colman "Caves."
Small, nylon, dome tents gotten for free from a Marlboro promotion. I still have these as they're very strong, although kinda small. (4 foot center height) Will handle two adult sleepers and a little gear.
2 Coleman "Pop-up" tents" (Marlboro Promo)
These go up in 60 seconds, but need an additional tarp back up for nasty weather. Will sleep 3 adults or two with gear. (1/2 star rating)
2 "Off-brand" igloo type 3-season Nylon tents bought from Sam's Club.
These tents are a "North-Face knock-off" that boast they sleep 3 people; I use it solo with my gear. The poles are made out of aircraft aluminum, came with a "footprint ground-cloth", as well as a small "loft". They cost $60 10 years ago, & alledge to be a "backpack tent" despite the fact they weigh 20 lbs.
2 Coleman "Red Canyon" Cabin tents.
These huge, nylon, 3-room cabin tents were/are made by Coleman exclusively for "Wally-World" & the price was cool at $80 each. I use mine as a 3room apartment at the Fest since I'm out there for 10 days. Plenty of room for a cot, camp table, & a camp chair or two. The center ht. is a bit over 6 ' so you can stand up when changing clothes.
Hope this helps. :cool2: