the UK DPM- the US looks too clinical, and i find flecktarn and realtree ugly. digital camo looks interesting, but i'm not really sure whether i like it or not yet. of the US MARPAT and the canadian CADPAT, i prefer the former, as it's more subdued- the canadian stuff only looks like it would work in a southern woodland clearing at midday in july!
i still can't fault the UK soldier 95 trousers- they last a couple of years, have perfectly sized pockets (the leg pockets will take 2 OS maps each, and swallow a clipper and laplander), don't have a weird pattern, and only cost £15!