Howard: There have been a few threads from time to time showcasing people's home displays. Unfortunately the search function doesn't laser in on all of them. I tried searches for "man cave" and "memorabilia room" and came up with a few. You'll need to be a bit creative to see what you can find; you'll probably stumble across a ton of interesting threads while you're looking. Getting there is half the fun.
http://tinyurl.com/2wn7w3s
http://tinyurl.com/2868pc2
http://tinyurl.com/26m99zt
http://tinyurl.com/2d8ta9o
http://tinyurl.com/2aym9c7
Some of the threads are two or three years old so some of the picture links will have expired. I recall there being other threads - probably are plenty more - but you'll have to dig away. Maybe some of the other guys might come along and post photos of their awesome manly man caves in the mean time.