The Daily Grind: Which MMO has the best PUGs?

Whether you are lucky enough to play with a steady group of good friends or you're more of a soloist, you've still probably encountered the stray pick-up group or random team member here and there. Many gamers even spend all of their time with strangers. But if you've played several MMOs, you may have also noticed that there seems to be a difference in the playerbases. Some games are notorious for having more immature players while others can safely say their players are the best. But which ones? Which MMO do you feel has the best PUGs?

I decided to take this question an extra step by adding a poll in which readers could vote. The top games are included in this poll, but certainly feel free to add your own to the comments below, along with examples.%Poll-33107%