Lovely to have my ego stroked by you asking all these questions
Yes, I did like it. I think it's an interesting thing to explore, how our inner life is always somehow the same no matter the circumstances we live in. If you have a life threatening disease it will feel like a big problem and if you only have a small problem it will "occupy the space" and seem like a big problem. It's as if our experience of the world is scaled to the emotional capacity (and appetite?) of our brains. If you live a life where a lot is going on it will feel like that at first, but in the long run it won't make an impression on your anymore. And if you live a life like Drogo's where nothing happens then you will start paying attention to the most minuscule details to fill your inner life with. Not to mention jump at the opportunity to dramatize your existence with things that you really know don't even exist (but refuse to admit). It's a bit like Tom Hanks in Cast Away with the volleyball, he just had to find a way to fill his life with something, even a fake person.
The other major theme to me is the dependence on someone else to give meaning to your life. This is problem is alive today as ever and maybe always will be around. Drogo wasn't able to find a purpose through life with the people around him. He left for the fort because he needed some purpose. And then he spent his life hoping in vain that the war would come and that his life had a goal. All too common malaise. If you can't figure out why to live noone's gonna do it for you anyway.
Boring? Yeah, a bit. It would be heavy to read 700 pages of this, but it's not a long book so.