pozidriv practically doesn't exist outside Europe. It still requires proper down pressure which sometimes (ladders) is hard to come by.
I prefer (inner) hex for bolts and torx for screws. Torx is ok for bolts too (mostly m4/m5). Standard hex is fine for wood anchors as well. A rather important downside of torx: you can put a smaller torx driver - say T15 in T20 (and esp. T8 and in T10) - that ruins both the bit and the screw head. Hex doesn't suffer from that issue.
> pozidriv practically doesn't exist outside Europe.
I had to think for a while to remember the last time I saw a Phillips screw here in the UK. Then I remembered - it was about a year ago when I had to take something apart, and I cussed the thing out for having a screw that almost matches the screwdrivers that everyone has, and who even has Phillips screwdrivers these days anyway?
I prefer (inner) hex for bolts and torx for screws. Torx is ok for bolts too (mostly m4/m5). Standard hex is fine for wood anchors as well. A rather important downside of torx: you can put a smaller torx driver - say T15 in T20 (and esp. T8 and in T10) - that ruins both the bit and the screw head. Hex doesn't suffer from that issue.