Monica Geller altered the trajectory of the entire series, having life-changing effects on its characters. Summarizing the role of Monica in the series, Martin Gitlin wrote in his book "The Greatest Sitcoms of All Time" that while her friends "were ... just out to make the most of their social lives", Monica "sought to keep the others in line" while searching for "Mr. Right", who surprisingly turns out to be close friend Chandler. Several years before Monica and Chandler became romantically involved, Cox once joked in an interview that if her character were to ever have sex with another main character, it
Monica Geller believes that Cox's own cleanliness closely resembles her character's; at times the actress would clean her co-stars' dressing rooms. Cox also shares the character's motherly nature. The actress enjoyed portraying Monica she was able to "bring more of my own personality to her, and I've never really been able to do that before." Starpulse.com observed that "As Monica, Cox never quite enjoyed the sort of watercooler storylines that co-star ... Jennifer Aniston had with David Schwimmer as the on-again, off-again Rachel and Ross." At one point, Cox had begun to regret her decision to accept the role of Monica over