These days, I'm a big fan of live outside trailers. I figure I'm on a trip to spend time outdoors, rather than cocooned in a trailer. Added benefit of them being lightweight, maneuverability, and offroad capable / compatible.
Here's a smattering of different trailers in the group I run with. I've probably camped with these rigs/friends couple dozen times so have had ample time to see them in action and trade notes over the campfire.
Taxa WoollyBear
My current infatuation. Just so easy and compact. Tons and tons of flat table like space without deploying more tables. Ergonomically excellent. Stable base for any RTT. Tows easy with minimal impact to MPG. Stores easy in any garage. Can be had for ~$10k all day lightly used. Doesn't bother with fussy built ins yet functionally works as good or better.
Off Grid Expedition
Nice hardsided sleep inside trailer with lots of storage, kitchen, and off-road chops. These start getting into larger sizes where that factor itself will always be an impediment off-roading regardless of off-road capability. It does bring a lot of capacity for luxuries with 180* awning, separate RTT for kids, etc. One major fault to these types of trailers is you still can't stand up in them and no bathroom. Good RTTs sleep just as comfortably, except in wind. For this size and class, it's a solid option.
Vorsheer XOC
Brings all the off-road capability with 35s, axle-less suspension, and clearance. Unfortunately even as it's super capable and robust, this starts to become too much size and weight off-road. Ergonomically in a word, it sux, and we never use its kitchen as it's so high up. Makes awning and RTT hard to deploy too.
As robust as it is, my friend has had to replace the suspension as it fell victim to its own size and weight. Granted we've rock crawled with it too, but that's what it's sold to do. Not a great idea to actually rock crawl for many reasons. And parts can be hard to come by.
Less would be more.
Wildcard homebrewed DIY trailer
Built on a HF trailer frame in my backyard over a couple months, this one is small and sweet. The theme plays out over and over where smaller can be better, and less is more if one is looking into a real off-road focused trailer. Can't tell it's behind you and it will follow everywhere.
Simple straight axle, leaf springs, and 31s will go everywhere the tow vehicle can. And then some. IMO, independent offroad trailer suspensions are the biggest sham. Trailers don't need to articulate the way a vehicle does because they are tripods. Articulation can be a liability because of rollover. What is more important is low center of gravity, aired down tires, and a robust straight axle. Benefit is these common axles can be serviced with parts just about everywhere.
Bonus picture, it's small but sets up big.
GFC Platform Camper on Ranger Raptor on 72Weld Portals
This is where my mind is currently. No trailer might be best but hard to host a family of 4. Max off-roadability.
Airstream 27FB
Can't win any off-road prizes and unfortunately more than half my trips aren't compatible bringing this. But when it comes to extended road trips, the style and comfort is unmatched IMO. 40mph winds coming off the coast here and no one wanted this spot. The aerodynamic shape and insulation had us sleeping like babies all night.
iKamper Skycamp 3.0
Off-roading, I prefer no trailer or camper. With some planning, I can host my family of 4 with comfortable sleep, water, bathroom, and fridge. Key to this is the aforementioned Skycamp and a swingout kitchen box and water on a hitch carrier. Maximizes technical capability and speed off-road.