I bought a "Large sedan" because I like the comfort, quality and toys that you get with larger vehicles as opposed to a supermini. I do not find that I need anything tall, I can see quite happily as far up ahead as need be without needing to be 20 ft off the ground, and I'm quite content with my car's crumple zones and four airbags.
Anything else strikes me as a substitute for skill (it's often aparant too, when watching some people (ok, women) attempting to drive/park these behemoths).
This of course applies less when you live in the middle of nowhere, for example, and you hvae to navigate treacherous slippery, dangerous roads or mountains especially in winter time, but in urban areas they're simply not necessary.
@ Nicho, I know what you mean, I hate not being able to see through them! I just stop the car's length back from the roundabout junction, no harm in doing that