Ross Geller is a bit of the nerd of the group of Friends, but definitely a member as his sister is Monica and Chandler was his friend from college.  Ross startts off as a paleontologist at the New York Museum of Natural History and later becomes a professor at NYU.

Ross is infamous for his on-and-off again relationship with Rachel, that ends with them having a kid together and mostly in the on-stage.

Of course, we can't write a bio for Ross without mentioning his three failed marriages to: lesbian Carol (who he had a kid with), Emily, and Rachel (which got annulled).

Ross Geller Quotes

Monica: What you guys don't understand is that kissing is more important than any other part of it for us.
Joey: Yeah, right. (They all stare at him) You're serious?
Phoebe: Oh, yeah.
Rachel: Everything that you need to know is in that first kiss.
Monica: Absolutely.
Chandler: Yeah, I think for us, kissing is an opening act, you know, like the stand-up comedian you have to sit through before Pink Floyd comes out.
Ross: Yeah, yeah. And it's not like that we don't like the comedian. It's just that that's not why we bought the ticket.
Chandler: You see, the problem is though, after the concert over, no matter how great the show was you girls are always looking for the comedian again. You know, and we're in the car, fighting traffic, basically just trying to stay awake.
Rachel: Yeah, well, word of advice: Bring back the comedian. Otherwise next time you're gonna find yourself sitting at home listening to that album alone. (High-fives Monica)
Joey: Are we still talking about sex?

Joey: (About Chandler's third nipple) I can't believe you. You told me it was a nubbin.
Ross: Joey, what did you think a nubbin was?
Joey: I don't know. You see something, you hear a word, I thought that's what it was. Let me see it again.

Friends Quotes

Chandler: Okay Joe, I gotta ask. The hot girl from the xerox place buck naked (He gestures with his one hand), or a big tub of jam (He gestures with his other hand)?
Joey: Put your hands together.

Monica: What you guys don't understand is that kissing is more important than any other part of it for us.
Joey: Yeah, right. (They all stare at him) You're serious?
Phoebe: Oh, yeah.
Rachel: Everything that you need to know is in that first kiss.
Monica: Absolutely.
Chandler: Yeah, I think for us, kissing is an opening act, you know, like the stand-up comedian you have to sit through before Pink Floyd comes out.
Ross: Yeah, yeah. And it's not like that we don't like the comedian. It's just that that's not why we bought the ticket.
Chandler: You see, the problem is though, after the concert over, no matter how great the show was you girls are always looking for the comedian again. You know, and we're in the car, fighting traffic, basically just trying to stay awake.
Rachel: Yeah, well, word of advice: Bring back the comedian. Otherwise next time you're gonna find yourself sitting at home listening to that album alone. (High-fives Monica)
Joey: Are we still talking about sex?