I currently use a cheap ish leather one I picked up at the new forest show. nice fairly wide leather belt for about £6, and its held up realy well so far. my absolute favorite belts where also purchased at the new forest show, the first was a brown one two years ago, from an individual maker, who i think mainly did saddlework, but was selling belts. the next year (when I was working there) I went out of my way to find the same stall, to purchase the same belt design, in black, which just shows how much I loved this belt. I also have a scouts uniform belt, which I used to use, but is now wearing out.
I prefer leather partly because it seems more comfortable, and partly because almost every webbing type trouser belt I have seems to rub in an uncomfortable way, and all other designs are just too "fashion" or "army" for my tastes. The only one that works for me at all was the belt that came free with my craghoppers, and that doesn't support a leatherman whatsoever.
on the other hand leather doesn't take as well to getting wet.
next new forest show I attend, I'm going back to the maker of my thinner two, and getting a couple more (maybe something a little thicker, and I think I saw a money type belt there too....)