I read TBK in Thailand when I was 19. Being 19, surrounded by beaches and drunken young women, reading TBK, says it all about me really and most of it was completely lost on me. I just wanted to be able to say I'd read it, I suppose. As far as I recall the best bit is the bit everybody knows about with the grand inquisitor where Dostoevsky accidentally proves that god's a bastard or doesn't exist.
When I went to the US I remember this weird feeling, uncanny because it was so close to being like the UK but so far. Same language. Same sort of shops. But everything different. So that I can never say if the US was scary or if I was just scared cos of this uncanny valley effect. Also I was as mentioned upthread 10 years old and wasn't carrying either.