In reply to Bjartur i Sumarhus:
Agree - stunning filming of a very intriguing plot. The fact that major characters die off so often keeps you on your toes.
Generally I hate action films and anything sci-fi/fantasy/wizards/warlocks/dungeons and dragons etc, so I had very low expectations of this series. I was expecting something as mind-numingly tedious as Lord of the Rings. But as my wife was a big fan of the books I agreed to watch the first episode and was hooked for the start.
First of all, it's basically British history from my favourite period - the War of the Roses - but all mixed up and chopped around and bits introduced from elsewhere. So on a human level it's entirely credible - but you don't know how it will play out, and you can't quibble about the historical inaccuracies.
As to the fantasy elements, they can be seen as allegories. Dragons are gunpowder - a new super weapon, gives you a big advantage, as long as you can keep control of it. The white walkers are global warming - a massive, indiscriminate, existential threat that the various factions largely ignore - resources to protect against it are scant compared to those which they use in their far more petty squabbles.
As to the Battle of the Bastards, it was one of the few occasions where the good (or better) guy won an heroic victory, but nonetheless it was gripping stuff and as a viewer you felt pretty immersed in it.