I just finished Half-Life 2: Episode Two again. Playing it through on my new computer was a real treat, and the ending of this episode still brings a tear to my eye. One thing jumped out at me for the first time on this play-through: the end credits. Valve has chosen to present the end credits in a short, yet elegant way. Every contributor is listed in alphabetical order by last name, with only a few notable exceptions (all the voice talent is singled out, for example). The result is a short, concise credits sequence that isn't a bore to sit through. Compare this with the end credits for Call of Duty 4, which go on for so long that a rap song is performed to break the monotony (I believe the end credits are on the order of 3 or 4 minutes long in that particular title).
I'd really like to see more end credit sequences patterned after Valve's design. Others may disagree, but knowing who did what on a project isn't very important. Listing each contributor in a single group levels the playing field and gives everyone an equal measure of thanks.