I agree with Conscript's post on the first page. I would have little issue driving my vehicle without driver aids, but at the same time would rather not, for those "just in case" moments. I use feet to control the amount of power I ask the engine for, so rather than wheelspinning at every set of traffic lights I drive off smoothly...
That's assuming 4WD doesn't count!
As for whether I could turn them off, traction control definitely, the others like ABS, probably not. 4WD I can turn on when I feel like it.
All that said, even with traction control and winter tyres, 400hp RWD and a feather foot has still caused the occasional sideways move on ice when not in 4WD!