The last few years, I've bought more things on Thanksgiving/Black Friday than Cyber Monday, but neither are generally huge days for me - it's usually a few small things here and there. The week or two right before Christmas is better for me - some really good deals tend to pop up as retailers get desperate to dump excess stock. Although those items are usually "gifts to myself" because many don't arrive by Christmas - but that's OK, I'm patient when it come to receiving my own gifts LOL
But my favorite is usually Kohl's Veteran's Day sale ($10 off $25 + 30% off for card holders). Fingers crossed it happens again this year - I'm starting to work on my wish list for that