I've tried all types and since I'm in the military, I have plenty of BDU's (and the newer ACUs), but I try to avoid too much of a military look unless I'm hunting. Wool is great in colder climates, but way too much for me down here in Texas. We did some hiking over this spring break and I was able to try out my REI Mojave convertible pants (they're 65/35 cotton/nylon)...very rugget pants. We did a lot of scrambling, bouldering and off-trail bush-whacking; very impressed. Another pair I was able to finally do some climbing in are Railrider's mess leg pants. We bouldered all over some granite rocks and these pants held up very well...the granite was pretty sharp in some places and even cut my arm and hands a few times, but no tears or visible abrasion on the pants.
ROCK6