For me, its whatever is on sale the week after deer season ends. Although I have to admit the jacket/bibs I bought from Cabela's is a little too green for the time of the year in Minnesota. I forget what the brand of camo is, probably Mossy Oak, but I think its a misprint because it's awfully green. But it was 80% off, very warm, and very waterproof. Plus if deer let me shoot them wearing blaze orange, I don't think they'll care if my camo is too green either.
As far as blending into the area I'm in - Realtree AP always seems to be the best match - at least among the camo I own. But I only have a few warm weather jackets/pants in that.