I refused to drive in Britain despite them also driving on the left because the lanes were so narrow. I would often be terrified as a passenger that the driver would lose a mirror or scrape cars. It took TWO YEARS years for the feeling to subside enough for driving to not be horribly nerve-racking.
Walking around downtown on my first full day in Seattle, the sheer size of the vehicles parked in parking complexes really stuck out. It was my first true impression of America. Recently I met a fellow Aussie who used to live in Texas and told me that there, instead of perhaps 20% of locals owning tank-sized vehicles, it's more like 80%.
Personally, I'm one of those people who thinks an unnecessarily big vehicle or 4WD that never goes off-road is for many people, either a manifestation of an attitude "I can do what I want," "keeping up with the Joneses" or a way to make yourself feel safer, both at the expense of other drivers around you and an increased chance you roll your vehicle. Unless you, dear reader, have a 4WD or pickup truck, in which case I am not judging you. (ಠ_ಠ)