Monica should have married Richard. The Monica and Chandler story line irritated me a lot.
Phoebe is a bitch. Always putting herself before her friends, stitching people up, she is rude and arrogant and annoying. I dislike her.
Ross is a comical character to watch but would be a pain the the arse as a friend, I agree with the OP that Ross is just too whiny. Rachel could do sooooo much better ;)
Joey is a sexist pig. He has no respect for women, he is thick and annoying. He is a sponge and should get a proper job and realise he is not a good actor. He should try and keep his willy in his pants. I couldnt be friends with him.
Rachel is the character I most enjoyed watching evolve. She has a massive learning curve and establishes herself well, getting a good job, being a good mum, a good friend. I think I could be friends with the later series version of Rachel.
They all deserve each other, really. But... Monica should have ended up with Richard, Chandler with Cathy, Ross with Emily, Rachel with Tag, Phoebe with David (argh, the whole Barbados Mike/David thing pissed me right off, fuck off Mike, Phoebe and David were always destined to be together, he was always the One that Got Away, Mike should have stayed away, I was gutted when Phoebe chose Mike over David!!!)
Joey either needed to change his attitude to women or he deserved to be alone.
I love Friends though lol