How long the meat is aged depends primarily on the temperature at which it's aged. Fresh meat may keep 48 hours in 70 degree weather, and 30 days or more @ 34 degrees. If it's cold enough to freeze, it will keep for weeks - though it will dry out and doesn't really "age".
I love the taste of fresh venison, and also of well aged venison. Proper aging changes the texture of the meat and the taste. I would say the texture is like a fine aged beef filet, the taste is like fine aged cheese - a slightly enhanced, smooth, mellow, taste.
As the meat ages, the color will also change - it will be more of a deep merlot red, rather than fresh meat red. The meat will also loose some moisture.
Take some well aged venison, dip in seasoned flour and fry in a hot pan. Serve covered with butter sauteed mushrooms and beverage of choice.