Season 1: Joey Francis Tribbiani, Jr.
1) He doesn't understand why the others didn't enjoy the musical 'Freud!' He did, heavily and sometimes in the shower, he still sings along. Rachel once caught him doing so, and she joined in, and Joey seemed thrilled she still remembered the words.
2) He always liked and respected Estelle. Yes, she was terrible at her job, and yes, Joey would have had a lot of offers if not with her, but Joey is extremely loyal like that.
3) Joey still sometimes brags about the fact he was Al Pacino's butt, not showing off, and he fails to mention the fact he was fired. Telling women he was Al Pacino's butt double is a perfect way to seduce them, along with How You Doing?
4) He isn't insensitive, it's just at Ross and Monica's nana's funeral, the game was on, and he was sure that was what the old lady would have wanted, them to be enjoying themselves. That's what he wants at his funeral anyway, to have people celebrating the life of Joey Tribbiani, not mourning, but happy that they had the privilege to be his family and friends.
5) That poster seriously dented his reputation, just for a while anyway. Ok, it lost him a one night stand, but he also lost the chance to spend the most important time of year (in his opinion, because of the food) with his loving family. The thing Joey does for money.
6) To be honest, Joey's still not sure why he kissed Chandler at the New Years Eve party. Perhaps it was the spur of the moment, or the lack of kissing he had been having, or the exhilaration of the New Year. Joey and Chandler's relationship has never been nothing more than a dedicated friendship, and that's the way they love it.
7) Joey loves his parents, and is proud to be a Tribbiani. So he thinks 'what the hell is my dad doing having an affair?' He still doesn't like it, and finds it extremely hard to accept that both his parents know, accept and love the fact that his dad is sleeping with another women.
8) Joey was thrilled to see that Ross wanted advice from him. For Joey, seducing ladies was the easiest thing ever, and that can start from How you doing? He always thought himself the ladies' man, with many people dating Chandler's sexuality. And Ross, the divorce force. You just can't match up to Joey's standards.
9) Ursula and Phoebe. Two people who look exactly alike it's uncanny (well, they are twins) but are so unbelievably different. He knew it hurt Phoebe when he started dating Ursula, but he knew all Phoebe cared about in the end was making sure Joey didn't get hurt. He loves her like that.
10) That time when Joey wasn't allowed to engage in the activity he enjoyed the most should have been awful for Joey. But instead, he found himself rather enjoying it, enjoying the company of Melanie instead of her body. However, Joey is secretly glad he didn't continue with this, he enjoys how his life consists of one-night-stands.
I found Joey and Phoebe quite hard to do, because they are very different to the others I think, and like Phoebe, I couldn't find that many Joey-based episodes. However, for Ross and Rachel, I think that will be quite the opposite (:
Thanks for all the alerts, you guys :D