I hunt ground and stands. Depends on terrain and what's best for the certain spot I want to hunt. Sometimes you find a great spot near a field edge or something else but there's not a straight tree or big enough tree to get a stand on so ground blind is the perfect tool for the job. I hunt blinds especially when it's raining or extreme cold and wind. Makes the hunt more enjoyable. Naturally built blinds out of trees and brush are best to fool the eyes of a deer but they also don't provide the rain or wind protection. There are some very good pop up blinds on the market though. My personal favorite is the primos double bull. Quite pricey though but they hold up extemely well and you can get years of use out of it which is worth the price. (Unless you forget to tie it down good and the notorious Kansas wind takes that thing off the ground and shreds it in a barbed wire fence! Whoops!). For a decent blind you should figure on spending around $100-$175. I picked up a Ameristep Patriot blind from cabelas for $100 a couple months ago and it's been out in the woods since and is holding up well and isn't bad at all for the price. The only thing I don't like about it is the lack of brush straps. They really help when you brush the blind in to break up the outline of it. Alot of cheaper blinds also have a shiny finish to them which will spook deer at first but they eventually become used to it being there. Like anything else in the woods once its there long enough they won't pay any attention to it. If you brush in a pop up well and have it out a week or so before you plan to hunt they won't notice you at all. Also only open the windows as much as you need to see at first then open the rest when it comes time to shoot. I keep all my windows mostly closed and just pull them to the sides a bit to peek out every minute or so to cut down the chances of a deer seeing me moving around inside. Also the more windows you keep closed the darker it will be inside which will shadow your movements. Wearing black also helps you blend in with the interior darkness. And remember to tie those suckers down lol. They are very light and it doesn't take much wind to blow them around! Hope this helps you.

Here's a pic of a blind I brushed in on the edge of a field for a handicapped client that couldn't use tree stands. Had about 5 other blinds similarly brushed in according to the foilage surrounding it.