It's a tough call - you see,the books are very much 'everyone is an a-hole' too - it's all very grim and realistic, if anything the tv series makes it all a bit sunny and friendly, and certainly adds a lot of flapping jubblies into the mix. But so far it seems a pretty faithful adaptation - only the aging-up of the child characters (highly understandable since in the books they are regarded as adults at 13 and thus are stripped naked at times eg Daenerys - malfoy's sister - who is supposed to be 13 and who has sex with a grown man, which of course you CAN"T show on TV for very obvious reasons) stands out with Bran being 10 in the TV show and 7 in the books.
Stick with it, if it follows the books then you will eventually warm to the characters - could be tricky as there's a lot of them. the books are written with each chapter told from the POV of one character and that allows you to get into their heads more.
I find the actor playing Jaime is the annoying element at the moment. He's Danish in real life and his accent keeps meandering. Tyrion, the dwarf, is my favourite in the books, follwed by Arya and Jon Snow.