Good comments from all. Glad you cleared up your post Don - I had a feeling you didn't mean straight down.
I like my deer 5 - 15 yards out. I've shot many, many deer at 5 or 6 yards. One thing that comes to my mind is how high your stand is will, for me, determine how effective this shot is. There's a good difference between shooting a deer at 5 yards from a 15 foot stand versus a 25 foot stand.
Also, the steeper the shot angle the more bone you have to go through. I know I've heard internet hunters talk about how they always blow through deer. Well, my arrows blow through a lot of my deer, but shooting a deer at 5 or 6 yards requires a lot more penetration to exit if you're hunting high. Thats why I'm hunting lower this year.