Gatsby could also be considered a "WOWER" throughout the book too. That is all he is trying to do is give the woman that he adores everything that she thought he didn't have back in the older days. That is truely what every man or woman wants to do with their loved ones, to give them everything that they desire. Sometimes they are unreasonable and it cannot be done, but Gastby still makes an attempt of it. A huge amount credit is given to this man for the things that he does for Daisy. Gatsby becomes and still is a true gentleman.
Fitzgerald delays the introduction of most of this information until fairly late in the novel. Gatsby’s reputation precedes him—Gatsby himself does not appear in a speaking role until Chapter 3. Fitzgerald initially presents Gatsby as the aloof, enigmatic host of the unbelievably opulent parties thrown every week at his mansion. He appears surrounded by spectacular luxury, courted by powerful men and beautiful women. He is the subject of a whirlwind of gossip throughout New York and is already a kind of legendary celebrity before he is ever introduced to the reader. Fitzgerald propels the novel forward through the early chapters by shrouding Gatsby’s background and the source of his wealth in mystery (the reader learns about Gatsby’s childhood in Chapter 6 and receives definitive proof of his criminal dealings in Chapter 7). As a result, the reader’s first, distant impressions of Gatsby strike quite a different note from that of the lovesick, naive young man who emerges during the later part of the novel.
Fitzgerald uses this technique of delayed character revelation to emphasize the theatrical quality of Gatsby’s approach to life, which is an important part of his personality. Gatsby has literally created his own character, even changing his name from James Gatz to Jay Gatsby to represent his reinvention of himself. As his relentless quest for Daisy demonstrates, Gatsby has an extraordinary ability to transform his hopes and dreams into reality; at the beginning of the novel, he appears to the reader just as he desires to appear to the world. This talent for self-invention is what gives Gatsby his quality of “greatness”: indeed, the title “The Great Gatsby” is reminiscent of billings for such vaudeville magicians as “The Great Houdini” and “The Great Blackstone,” suggesting that the persona of Jay Gatsby is a masterful illusion.
As the novel progresses and Fitzgerald deconstructs Gatsby’s self-presentation, Gatsby reveals himself to be an innocent, hopeful young man who stakes everything on his dreams, not realizing that his dreams are unworthy of him. Gatsby invests Daisy with an idealistic perfection that she cannot possibly attain in reality and pursues her with a passionate zeal that blinds him to her limitations. His dream of her disintegrates, revealing the corruption that wealth causes and the unworthiness of the goal, much in the way Fitzgerald sees the American dream crumbling in the 1920s, as America’s powerful optimism, vitality, and individualism become subordinated to the amoral pursuit of wealth.
It seems that Gatsby is rather blind to the wicked ways of Daisy and other old money people. Even after Daisy kills Myrtle (an accident of course) he can't see that she shows no remorse for what she has done, and all Gatsby can see is Daisy, his one true love. Gatsby could also be considered as a rather shifty character, since he made his money in illegal dealings, gambling, and bootlegging alcohol. In the end he is one of the better people in this story, doing what he did for love (however misguided) rather than simply to cure his boredom. Gatsby speaks formally and he has a habit of calling everyone “old sport.”
Gatsby is contrasted most consistently with Nick. Critics point out that the former, passionate and active, and the latter, sober and reflective, seem to represent two sides of Fitzgerald’s personality. Additionally, whereas Tom is a cold-hearted, aristocratic bully, Gatsby is a loyal and good-hearted man. Though his lifestyle and attitude differ greatly from those of George Wilson, Gatsby and Wilson share the fact that they both lose their love interest to Tom.
Tom is Daisy's husband, and supplies her with anything she could need or want, along with a little teaspoon of heartache. In the beginning of the story we quickly discover that he's a philandering jerk and is currently cheating on his wife with Myrtle, and the whole town knows it. Later in the story, Tom discovers Daisy's affair with Gatsby and he and Gatsby have a bit of a row, but Tom gets Daisy in the end, which is odd since Tom has REPEATEDLY cheated on her. Eventually he is the one who assists Mr. Wilson (Myrtle's clueless husband) in the discovery of the person responsible for Myrtle's death. In the end he doesn't get what's coming to him, and he and Daisy leave New York.
He seems to be a static character; he is controlling of Daisy in both the beginning and the end. Ex: at Gatsby's party when Daisy is having herself a grand old time, Tom orders her into the car. And in the end of the story, after their confession of love, Tom orders Gatsby and Daisy to drive home. Tom is also sneaky and resorts to trickery that leads to Gatsby's demise. Tom displays a hint of jealousy when Daisy knows a man (Gatsby) that Tom does not.
http://www.sparknotes.com/lit/gatsby/characters.html