I find a lot of people jump into CADPAT because its what our military uses.
Thats fine, no worries, use what you like, but I find most of the places I play work better with camo patterns that have a little more brown in them.
Even in woodlands, theres less green then you might think. OD/Green patterns seem like a great idea on paper, but don't always work out as well as you might think in on the field.
Maybe this photo will help explain what I'm talking about
The pattern shown in that picture is Multicam, the pattern I use.
It really comes down to personal preference though, if you find a pattern you really like, by all means, use it! there are certainly lots of environments where CADPAT would be far superior to multicam.
Sorry if this post didn't really make sense, I've been up for like 20 hours