Just about any scene with Much the Miller's Son and Bess in it.
Bess: You will be carful wont you.
Bess: (bashful smile) Course I will.
When Robin bursts in through the dungeon door after defeating Sir Guy and Marian runs into his arms. It's the smile that does it.
Marian is still suspicious of Robin after he robs her caravan, saying his men will likely just keep the money for themselves. So Robin shouts the suggestion to them, and they all reply that they'll use it to pay King Richard's ransom.
Little John, upon learning that the man who he beat in the quarterstaff fight was Robin Hood himself, asks if he would not hold their fight against him, to which Robin merrily tells him that not only that he doesn't mind the experience, but he'd welcome the giant into the Merry Men.
The moment when King Richard reveals himself to the Merry Men and they instantly kneel before him. When the King notes in awe, "These men, have remained loyal." it comes off as a glorious validation of everything Robin Hood and his band have been fighting for.
A Real Life moment is that this film gave Jewish composer, Erich Wolfgang Korngold, his one chance to make a living in Hollywood after the Nazis conquered Austria. When the film became a smash hit, Korngold knew he won a secure place safe from the coming Holocaust; as he liked to quip, "Robin Hood saved my life."
"Marian, my darling, I love you more than life itself."
Robin going back into the castle to save the baby rabbit.
After the Sheriff takes Skippy's gold farthing on his birthday, Robin comes by and gives him his hat for a present. Plus, he gives his mother a sack of money to feed her family with.
Robin: Keep your chin up, someday there will be happiness again. You'll see.
When the kids infiltrate the castle, Maid Marian is absolutely polite and takes care not to talk down to them. As the viewers we are made to understand that she is worthy of Robin Hood ((and not " (just) a prize to be won," as Princess Jasmine might put it)).
Marian's father is killed and Guy chooses a very bad time to make a move on her, so she runs distraught and heart-broken into her bedroom...where Robin is already waiting for her.
When Much says of Djaq: "Djaq may be a girl, but she's one of the lads."
Allan and Will's handshake just before Prince John's army attacks Nottingham in Walkabout.
Many found Will and Djaq's declarations of love in the Barn Scene of Ick to be impossibly cheesy - but just hit the mute button and let the actors' faces do the talking. The way they light up in esctasy when they realize that they love each other is just gorgeous.
John (of York) and Beatrice's forest wedding. D'aww.
Robin and Marian's Together in Death scene at the end of season 3. After what is initially a fairly formal reunion in which they reiterate their love for one another, Robin suddenly grabs Marian around the waist and swings her around in a circle, with all the playfulness and joy that's always been the hallmark of their relationship. The last thing we hear is Marian's happy giggling echoing up through the trees.
John's been rescued, and Robin gives him back his tags -well, one of them. Where's the other? His son knows: "I shall never forget! My father is a comrade of Robin Hood!"
Guy and Meg. Even though their time together is very short, it's still very sweet.
The song "Marian", it may be a parody but it's still a very adorably song, especially with the soft rock cover version that plays during the end credits.
Rabbi Tuck's introduction. He tells the merry men that his wine is only for blessing things. After seeing their disappointment, he says "Wait! There's things here. Trees, rocks, birds. Come, let us bless them all!"
When Marion surrenders to her grief and rests against Robin's shoulder as his hand comes up to stroke her hair. Quite possibly the most intimate scene in the whole movie — even more so than their goodbye kiss or kiss in the surf.
The fact that Russell Crowe talked Alan Doyle into auditioning for the role of Allan a Dale because he wanted to do a movie with his friend and thought this was a perfect match definitely qualifies.