The One After Vegas couldn't have been a better opener for season 6. Phoebe and Joey head back home in Phoebe's grandmother's cab, but Joey's inability to stay awake makes her mad at him. Phoebe and a hitch hiker have fun driving back and Phoebe forgives Joey after he promises to try to be awake for as long as he knows her. Monica and Chandler both don't want to get married but both think that the other one does; they end up telling each other that there would be a clear sign for them to get married. There are a lot of signs in Vegas and New York that seem to want Monica and Chandler to get married. Chandler eventually decides to move in with Monica. Ross and Rachel find out they are still married and Rachel wants them to be anulled, but Ross isn't as keen on the idea. In the end, Rachel thinks they are no longer a couple but it turns out Ross didn't get them anulled.
There are hilarious moments in all of the stories and there isn't one that stands out much more than the rest, which is unusual. Overall a great season opener to a great season.