Some guys tend to prefer the "ice cream cone" with the bottom point of the cone being downwind. This can be very elongated with the downwind point being 200 yards or more. Since snows typically approach from high up, some believe this long tail coerces them to get lower farther downwind of the blinds and approach the shooting zone lower. Some say they have good success with it. Personally, I have not seen this to be the case. Snows are prone to lift or split to the sides as they approach decoys so why give them more to look at way out in front of you. I think the single biggest adjustment I have made over the years in a sock spread on a feed is to draw the decoys that are far downwind in closer and to the sides. For this reason, I have a slight preference for a flatter, crescent shape layout. I want to get them closer to me before they can get the best look at the decoys. Some also like a simple round donut with the hole as the kill zone. Scott Butz seems to use this on his TV show and it's hard to knock the success he has with it. But the single most important thing to me is not the shape, it's avoiding a regular spacing of the decoys. Within whatever overall shape I am setting, I like multiple very tight clusters of 50 - 300, which may reflect 2/3rd's of the decoys. The rest are scattered with as much irregularity as I can achieve.