Good service, food orders are always spot-on, and it's quick to boot. For McDonald's, that seems to be extraordinary!
But seriously, their Drive-Thru is 24/7 and since it's down the street from my house that's fabulous if I come home in the wee hours. Or, if I need to grab a quick bite before I drink spirits. ;)
There's one guy there that's always extra-friendly and actually checks my ID -- on the back of my card it says "See ID." A+ to you, dude.
P.S. Fries have always been crazy fresh (and we all know that's the best thing about McD's!)