Of those who ever wore it, only Samwise Gamgee, Bilbo Baggins, Frodo Baggins and Tom Bombadil gave it up willingly. "Bearing" the Ring does not seem to be synonymous with merely touching or carrying it, since Gandalf refused to bear the Ring but was willing to handle it for a few seconds in Bag End.
He briefly gave in to the Ring's power, even calling it "my precious"; alarmed, Gandalf spoke harshly to his old friend to persuade him to give it up, which Bilbo did, becoming the first Ring-bearer to surrender it willingly.
Sam did, indeed, give up the Ring willingly, but, of course, that was after Gandalf had stated that that Bilbo had been the only one who had given it up. Also, Sam had only possessed the Ring for a few hours, so It had had less time to work on him, and his love for Frodo was a great help.
Sam served as Ring-bearer for a short time when Frodo was captured by orcs; his emotional strength was again demonstrated when he willingly gave the Ring back to Frodo.
While there is no official answer for why Bilbo and Sam were able to be rid of the Ring without too much issue, there is a lot of supporting evidence that suggests it was partially due to their inner morality, as well as partially because of the Ring choosing its own path.
Hobbits are naturally more resistant to the influences of the ring than other races (Gandalf comments on this). Sam had only been carrying the ring for a short time, the longer the ring is in someone's possession, the more addicted they become to it. Sam's love for Frodo was too great for the ring to corrupt.
Bilbo spent most of that time within the Shire, and most of that time by himself, and so the ring never had a chance to jump ship in favor of someone who would bring it closer to Sauron.
After all, Sam's loyalty is partly a result of his servant status. Since Sam knows his place and has no ambition to rise socially, he never appears to envy Frodo's wealth or authority in the Shire. In fact, it's quite the opposite: Sam loves and admires his master, as though Frodo's honor reflects well on Sam himself.
A further complication in the temptation of the Ring is that Faramir's staunch rejection of it: 'I would not take this thing, if it lay by the highway.
The Ring's effects
Inversely, the hobbits' good-naturedness and lack of ambition makes them less susceptible to the Ring's promises of power, as in Frodo and Samwise Gamgee, who are able to handle the Ring for extended periods of time.
The One Ring may affect Frodo more than Bilbo, but it still corrupts Bilbo to a certain extent. The Ring's influence on Bilbo is clear when Gandalf has to force him to leave it behind in The Fellowship of the Ring. Bilbo has clearly grown attached to the Ring after all the years he has been in possession of it.
The Ring cannot effect Tom Bombadil because he is outside the whole issue of Power and Domination; Tolkien uses Tom as an allegory that even this intense struggle between "good and evil" is only part of the whole picture of existence. On this page you can find everything about the Rings of Power.
Their dealings with the Elves led them to be more learned than the Harfoots and Stoors, and the Fallohides were often chosen as leaders among clans of Hobbits. Frodo, as a descendant of all three was uniquely suited to carry the One Ring to Mordor.
Gollum was a truly remarkable creature, for he was able to endure the Ring, and its influence for over 500 years. Although it had almost completely consumed him by the time that Bilbo found it on his quest for Erebor, he managed to stave off its evil far longer than most.
Tom Bombadil, the only person unaffected by the power of the One Ring, could both see its wearer and remained visible when he wore it. Unlike the other Rings, the main purpose of the Three is to "heal and preserve", as when Galadriel used Nenya to preserve her realm of Lothlórien over long periods.
Even if Sam had somehow managed to get it away from his master, the Ring would have fought with all its power to influence him away from destroying it. In the end, the only way the Ring could have been destroyed is if the person holding it unintentionally fell in.
Just like Gandalf and Galadriel, both even more powerful than Aragorn, who were also able to refuse the ring once. However they knew it would be very difficult for them to continue to resist it and they were not suitable to destroy it.
He was Isildur's Heir, and he felt responsible for Isildur's failure to destroy the Ring when he had the chance. Aragorn felt he had to do everything he could to make up for Isildur's mistake. Aragorn didn't want power for its own sake, or to dominate others…he wanted to right a great wrong and heal his beloved city.
Partly because dwarves just cannot be corrupted that way; it's in the way they were made.
They kiss at least four times; another time, it's specified that they don't kiss, which has interesting implications. And when they return to the Shire, Sam moves into Bag End with Frodo — no longer a servant, but an equal and a constant companion.
After his wife died in Fo. A. 61, on 22 September Sam left Bag End, and went to the Tower Hills where he was last seen by Elanor, entrusting to her the Red Book; according to her, he went to the Grey Havens to sail across the Sea and be reunited with Frodo in the Undying Lands.
The burden of the Ring so affected Frodo that he knew he could never return to a normal life or bear the responsibility of a wife and family.
Frodo even offers her the one ring. Galadriel admits she has long awaited the chance to seize the powerful token. But, she says, if she took it, she would become corrupted herself and rule over Middle-earth as a beautiful but tyrannical queen.
Sauron immediately senses Frodo and understands what has happened. Hence, whenever Bilbo wore the Ring — lacking any magical enhancements to help him look out upon Middle-earth, and being unconcerned with either Sauron or his fortresses of Dol Guldur and Barad Dur — there was no opportunity for Sauron to sense Bilbo.
According to the book, he never saw Bilbo. Bilbo was there, in the same hall, under the same roof but he careful enough to stay in the shadows and wear the ring. Smaug could smell him and he knew where he stood but never asked him about his invisibility.