Being a New Zealander, I love Anna Paquin as Sookie the faerie in True Blood.
I was sitting down watching an episode with my brother in law and his son and they both said in Season 5 that they were confused by the story lines so I posted this season synopsis to help any in a similar boat.
Season one: 2008
The main mystery of the first season concerns the murders of women connected to Sookie's brother, Jason (Ryan Kwanten). Maudette Pickens and Dawn Green are both strangled shortly after having been alone with Jason. Though Detective Bellefleur has little doubt that Jason is the killer, the town sheriff does not suspect him. Sookie's grandmother is murdered shortly afterward. At the end of the season it is revealed that Arlene Fowler's fiancé, Rene Lenier, is actually a man named Drew Marshall who has created a false identity, complete with Cajun accent. He has been killing women he considers "fang-bangers."
The first season also focuses on Sookie's relationship with Bill and Sam's relationship with Sookie's friend Tara. Bill explains the rules of being a vampire to Sookie and, after killing a vampire to defend her, is forced to "turn" a young girl named Jessica into a vampire as punishment. In the last episode of the season, Jessica is left under Bill's care. After Maudette and Dawn's murders, Jason becomes addicted to vampire blood and has a short relationship with another addict, Amy Burley, which ends when she is murdered by Marshall. The season ends with the discovery of a body in Detective Andy Bellefleur's car in Merlotte's parking lot.
Season two: 2009
Season two focuses on two main plots – in the first, the disappearance of the 2,000-year old vampire Sheriff of Area 9, Godric, causes Eric to enlist Sookie and Bill's aid in finding the ancient vampire in Dallas. Their paths cross Jason's as he seeks to discover meaning in his life with the Fellowship of the Sun, a church dedicated to anti-vampire activities.
The second plot line concerns a maenad named Maryann who visits Bon Temps after Tara attracts her attention at the end of the first season. Maryann is a figure from Sam's past and knows his true identity as a shapeshifter. Her influence on the town and its residents results in mayhem that grows more destructive as the season progresses. At the end of the season, Bill proposes to Sookie, but is kidnapped by unknown assailants when Sookie retreats to the bathroom to consider his proposal.
The second season loosely follows the plot of the second novel of The Southern Vampire Mysteries, Living Dead in Dallas. In addition, the character of Sophie-Anne Leclerq, initially introduced in the sixth novel Definitely Dead, was introduced as a major supporting character.
Season three: 2010
On July 30, 2009, HBO confirmed that True Blood would be renewed for a third season, which began shooting on December 3, 2009. It premiered on June 13, 2010, simultaneously on HBO and HBO Canada, and contained 12 episodes.
Season three loosely follows the plot of the third novel of The Southern Vampire Mysteries, Club Dead, and introduces werewolves to the show's mythology. It also introduces the characters of Russell Edgington, the Vampire King of Mississippi, and his private investigator, Franklin Mott. In addition, some characters from the fourth novel Dead to the Worldare introduced: Crystal Norris as Jason's love interest, her family of werepanthers from Hotshot, and Sookie's fairy godmother, Claudine. Sookie's heritage as part faerie is also revealed later in the season, a major plot element from the eighth and ninth novels From Dead to Worse and Dead and Gone.
Season four: 2011
The fourth season of True Blood contains 12 episodes. The first, titled "She's Not There", aired Sunday, June 26, 2011 in the US on HBO; it ended on Sunday, September 11, 2011. It is loosely based on the fourth novel in The Southern Vampire Mysteries series, Dead to the World.
A coven of witches, led by Marnie, poses a threat to vampires when they discover the witches are working on necromancy. Sookie returns to Bon Temps after a year (even though she was away for only a few minutes in Fairie Land) to find Bill as the new King of Louisiana and that her brother and friends had given up on her. As the series progresses, a powerful necromancer from the 16th century, Antonia, possesses the body of Marnie in order to exact revenge on all vampires. Sookie starts a romance with Eric who has amnesia due to a spell cast by Antonia / Marnie. The witch Antonia eventually realizes the wrongdoing she's caused to innocent people and decides to stop. Yet Marnie, addicted to Antonia's power, binds her against her will to acquire her powers. Subplots include Lafayette's introduction to the world of magic and his abilities as a medium, Sam's family troubles, Alcide and Debbie's troubled relationship, and Jason, Hoyt and Jessica's love triangle. The finale is a series of cliffhangers, including a warning from the ghost of Rene that Terry will cause Arlene trouble, the escape of Russell Edgington, the reappearance of Steve Newlin as a vampire, and the shooting of Tara.
Season five: 2012
On August 11, 2011, HBO announced that True Blood would be renewed for a fifth season of 12 episodes, to premiere in summer of 2012, with a confirmed date of June 10th at 9pm.  Alan Ball signed a multi-year contract with HBO in July 2011, but only agreed to produce the show for the fifth season. After the season five finale, he'll leave his position as showrunner.