These are just some of my personal favorites so they might be sort of esoteric ish maybe. And actually it's just lines that I quote a lot hahaha.

• "Tartlets?" (1.15)
  • Monica's potential employer is stoned
• "When were you... under me?" (2.07)
  • Rachel's over Ross, or so she claims
• "Why isn't it Spiderman?" (3.19)
  • Phoebe doesn't understand the concept of a superhero name
• "B-B-B-B-B" (3.21)
  • Chandler with the chick
• "What do you know, you married a lesbian!" (3.23)
  • Rachel doesn't want marriage advice from Ross
• "You fell ASLEEP?" (4.01)
  • Rachel talks like a psycho when she's angry
• "The line is a dot to you!" (4.07)
  • Chandler's so far past it
• "Michael Flatley, Lord of the Dance!" (4.12)
  • His legs flail about as if independent from his body!
• "Don't you just love the way they talk?" (4.14)
  • Phoebe's accented impersonation is great
• "Leafy, leafy" (4.19)
  • Phoebe tries to orchestrate the redemption match
• "I'm thinking 'no, but thanks.'" (4.20)
  • Rachel proposes to Joshua (also this is just an amazing episode)
• "PIVOT!" (5.16)
  • Ross importing the couch with Rachel and Chandler
• "Go drink some beer and hammer up some drywall!" (6.08)
  • Everyone was a girl that day
• "I'm still carrying a little holiday weight" (7.12)
  • Classic awkward Ross on the roof with Joey
• "Yes! Green-blue!" (8.02)
  • Wedding guest responds to Ross' 1995 Buick LeSabre guise
• "Through the magic of sight!" (9.13)
  • How did Ross see that?

and mores