I think I've only ever owned a couple of pieces of camo, one was a smock when I was about 13 when I started paintballing and the other was a goretex bivvy.
The thing about DPM is it's designed to keep humans hidden from other humans, an animal couldn't care less if you're dressed in neon orange or pink. The disruptive pattern helps not to give you away whilst hunting critters but it's certainly not enough, you still need a good level of fieldcraft to get your kill.
I think camo can be handy if you're wanting to keep to keep yourself out of sight of other people for whatever reason, being unobtrusive in the woods can make for a quieter weekend in some places no doubt.
Surplus gear is cheap as a rule and usually fairly hard wearing, for mucking about in the woods with your mates it's hard to beat, I still wouldn't wear it myself though, I do wear greens, browns and black but they're usually a solid pattern.