Some of mine are when he pretends to be talking in his sleep and tells Lucy that Grace Foster is having an affair with the milkman.
When he falls face first on the hard as a rock bed after climbing numerous stairs in the hotel in Italy.
When he breaks character in Cuban Pals after messing up his lines(I guess more of a Desi moment than Ricky).

I love every Ricky/Desi moment! I'm an Arnaz fool. :D
Love him during The Handcuffs, First stop with the bed moving away, Cuban Pals, the Jezebel number ect ect

I love ricky in the episode where he thinks he is going bald!! very funny indeed. :lol:

I loved it when he was sitting in that chair while in Hollywood and she HIT him upside the head, oh wait, that was the dummy.

Every time he starts ranting and raving in Spanish!! :rofl:

I like when he has the robe on when they come back from Hollywood and he tries to drive Lucy crazy by being demanding. "I can't seem to reach........"

Oh yeah, i love that scene where she's typing his fan mail as she shines his shoes and a few other thins, LOL! All at the same time, and eventually blows up a la Ricky when she's had enough, LOL!

I love the episode where they're on their way to California and they spend the night in that horrible cabin. Lucy and Ricky are in a bunk bed and Ricky has the top bunk. Lucy hears a noise and tells him the baby is crying. Ricky goes to step out of bed and falls to the floor. :lol:

I also like when Ricky and Fred are cooking dinner in the classic job switching episode. Ricky keeps slipping on the floor, over and over again.

I like everytime that Ricky laughs.

There are so many great Ricky moments and I think the ones that really stick out for me is when they are in Paris and Lucy gets arrested for the conterfeit money and he along with cops and the drunk have to interpret to each other about what Lucy was trying to tell them. IMO as funny as the whole scene was Ricky stole that scene...LMAO!

When the Ricardos changed apartments and he came home to find all the different objects in strange areas of the livingroom, just the look on his face when he found his socks in the desk drawer and then he sat on the couch and it squeaked from the baby's toy, no matter how he sat it made that noise. He didn't have to say a word and it was a riot.

In Equal Rights when he thought Lucy was really in trouble at the restuarant and he called the police and started rattling off to them in Spanish....that was just too funny! LMAO!

In Ricky loses his temper, he spanks Lucy at the end after the poor guy put up with all her antics and he was so funny throughout the episode with trying not to blow up. He even laughed with her before he whipped her across his knee and spanked her.

I can't believe I forgot one of my favorite episodes! It's when Little Ricky is playing the drums nonstop and Lucy and Ricky do everything to the beat. I think Ricky steals the show. His facial expressions are too much! I love when he starts going crazy. :lol:

I, personally, like Ricky best when he's not really in on it - Lucy's scheme I mean - and is so innocent-like, somewhat like a child. I always find it so funny when something happens due to Lucy's scheme and he says - in his childlike manner - "Wuh happen?" I also like Ricky Loses His Voice, when he has to be taken care of by Lucy and has to write on the chalkboard. http://www.sitcomsonline.com/boards/images/smilies/lol.gif

My favorite performance of Ricky in an episode is in the California episodes, preferably L.A. at Last and First Stop - two episodes where he seems to be on Lucy's side of things. Both are fantastic episodes - with great Ricky lines! Especially when he says, "If I try to kiss a girl in this thin', I'll cut off her nose," when he was wearing the suit of armor for Don Juan.