SUVs are purchased for a variety of reasons, not all of which apply to each consumer, and not all of which are valid:
Power (vs. minivans, some cars)
Seating Capacity (vs. 5 seaters)
Towing Capacity (vs. car chassis)
Ground Clearance (vs. minivans, cars)
RWD (vs. minivans, cars) Edit: 4WD option also a plus (vs. minivans, some cars)
Amenities (DVD, video games, etc) (vs. sedans)
Enclosure over the cargo capacity (vs. pickup trucks)
Safety (vs. cars)
Appearance (vs. minivans)
Gas Mileage (vs. some vans, comparable to other V6 or V8 vehicles)
Handling (vs. vans)
Ride Quality (vs. some cars, minivans, pickups)
Price (vs. some cars, vans)
Full Size Spare (vs. some cars, minivans)
Cargo Capacisty (vs. cars)
Of those, I'd say safety is the only one that isn't really a valid reason for picking an SUV, because it comes at the expense of others.
If you lay a tahoe out next to a Honda odyssey, you'll see that the tahoe gets only 5mpg less than the minivan (maybe even better if you compare V6 to V6, I'm comparing V8 to V6). If you told me the two were equal at all things (which isn't true because the Tahoe can go off-road, has more power, and can tow), I'd pick the tahoe because it looks better. I'd sacrifice 5 mpg for a better looking vehicle. That doesn't mean I'd have bought the tahoe for looks. It means that of the vehicles that did what I wanted to do, it was the best looking.
A lot of factors go into the purchase of a vehicle. Somehow folks have gotten it into their heads that SUVs are the bane of all existance because of their gas mileage. Minivans aren't much better but they're seen as responsible. Vans and V8 sports cars are typically as bad or worse, but somehow they don't have the evilness associated with them (no, the number of people that purchase them doesn't matter).
I'm sick of this conversation. I'm sick of listening to people who aren't listening to me. Where is your mercedes E class wagon? Where did it go? The responsible choice you guys were touting earlier!! I haven't heard a peep about it recently! Because it gets the same damn gas mileage as the SUVs you guys hate so much, but it can't do as much. That means you should hate the E wagon even more than SUVs, but I'm sure your attitude hasn't changed. Why would your attitude about a vehicle that gets SUV gas mileage but is less useful not get your attention? Because you hate SUVs irrationally. You like to hate SUVs, it makes you feel superior to others... regardless of whether it's warranted.
Go oogle over your V10 supercars guys. Go lust after that V8 powered sports car that gets SUV gas mileage but seats two people. Blame the SUV driving idiots of the world for everything you can think of, they'll be your scapegoats.