[quote author="roundcorners" date=1237018042]I like Kensington's plans in CG where the two car garage has this extra 1/2 car space where you can set up a home gym; park an electric car; or in my case, I would set up a man cave. A men's living room where the guys can hang out!</blockquote>
This is basically how my garage is. It has only a two car-wide door, but there's an extra car's worth of space beyond that-you could add an additional one car-wide door and make it a true three car garage if you wanted to.
However, best case scenerio is a bk-like rear garage, although I would like it to be attached to the house and not seperate (edit-like in the photo in bk's post). You need a large lot to pull this off, though, as you use up a lot of space for the long driveway (unless there's an alley).