To put it frankly, the books contain very little to be happy about. Each chapter is written in a "point of view" style, and follows several families through various political & fraternal struggles.
Just read the wiki page:
"Influences
Although Martin has acknowledged his debt to the works of J.R.R. Tolkien,[17] Jack Vance[18] and Tad Williams,[14] the series differs from these earlier works in its greater interest in and use of realistic elements. While Tolkien was inspired by mythology, A Song of Ice and Fire is more clearly influenced by medieval history, most notably the Wars of the Roses.[19] Likewise, while Tolkien tended toward romantic relationships, Martin writes frankly of sex, including incest, adultery, prostitution, and rape. As a result, illegitimate children play prominent roles throughout the series. This has led to the series being cited as a forerunner of a 'gritty' new wave of epic fantasy authors that followed, including Scott Lynch,[20] and Joe Abercrombie,.[21] On his website, Martin has acknowledged historical fiction authors such as Bernard Cornwell and George MacDonald Fraser to be influences on the series. Martin has cited the cover blurb by Robert Jordan for the first book to have been influential in ensuring the series' early success with fantasy readers.[22]"