I like ScentLok and have a couple of outfits in it. My only requirement is that it is waterproof (hate sitting in cold, wet cloths). Camo pattern is what ever is on sale.
I have grown quite fond of the Browning lightweight stuff from Academy. The ATACS TDX pattern is great on the ground or in a tree. For colder weather, I have a Mossy Oak Gamekeeprs fleece lined pants/jacket set in the old school Mossy Oak Bottomland camo pattern. It keeps me toasty with a couple of layers beneath it.