I've tried a few different patterns on a lot of 40K models, mainly US 3-colour desert and Multicam on IG and Lizard pattern on Chaos renegades, plus a few Soviet patterns on my 20mm bush wars stuff, as well as the Rhodesian. Great thing about guerrilla insurgent models is they can all be wearing something different.
I had a go at Belgian pattern 56 (think that's what it's know as, looks a bit like WW2 denison smock camo) on some 5 Commando ANC figures & a couple of different patterns on some 20mm Executive Outcomes models. I'm also slowly collecting some figures to make up a little Wild Geese team, so will have a go at DPM.