Commercial #3 is best....a mix of material from the show and a nice little bit letting you know that they put some work into the extras. The second one with all of Dr. Cox's insults is nice, but probably a bit inaccessible for someone not familiar with Scrubs. They would be best off melding #3 with #5 (the one that has an extensive listing of the extras).
The first one is really terrible :lol "It's a show about 3 wacky interns!"
I picked #5 as my favorite, because the alternate lines had me rolling.
I picked #1 as my least favorite, because it didnt tell me anything about the show aside from the 4 main characters, and it didnt say anything about bonus features.