I'll start: I own a full size, 1/2 ton 5.3 LS powered crew cab pickup with mud tires and it's been off road exactly one time and I VERY rarely have a single passenger. We bought my 17 y/o son a 3/4 ton version of the same truck but with a 6.0 and REALLY wide 33" mud tires and just about refuses to carry any passengers. I also have a perfectly good Suzuki GS850 that I cut up and am making into a gasp... hardtail chopper. My son has a Kawasaki KX 125 2-stroke. It's loud and smokes a lot.
(I did own two Yukon Denali's both obviously AWD and 6.0 powered and almost never had a passenger in those either. I think those are classified as SUV's. Let's not even mention my K5 Blazer-turned-pickup I had on 39.5" Super Swampers and 9" of lift)
I'm positive you guys can do better than me. Let's hear it!