It varies with your situation. This winter so far here in Michigan I've had to use 4wd more than in the past few years with a previous truck. Once underway I tend to switch to 2wd, but for initial movement I tend to have to start in 4wd or the tires will simply spin. I've tried starting in 1st, 2nd and 3rd in the deeper snow conditions, and occasional ice, but all seem to spin the tires just about as hard and produce an inability to move without 4wd. (The truck has the LSD option. Maybe if there was a Detroit locker available my opinion would be slightly different, but for now, seeing the lack of locking differentials, it's hard to get around the problem.
I tend to meander off road on occasion and for that, you simply can't beat a 4wd. Plus with a 4wd you get the BENEFIT of the beefy recirculating ball steering, instead of the relatively less beefy rack and pinion. R&P is for cars. How many other large vehicles do you see utilizing an R&P steering setup? My guess is not very many, and I suspect there is a reason for it...
I tend to meander off road on occasion and for that, you simply can't beat a 4wd. Plus with a 4wd you get the BENEFIT of the beefy recirculating ball steering, instead of the relatively less beefy rack and pinion. R&P is for cars. How many other large vehicles do you see utilizing an R&P steering setup? My guess is not very many, and I suspect there is a reason for it...