Brideshead Revisited question

Both started well and then faded into tedium for me - though the sequence on the cruise liner was excellent

The most interesting relationship I found was Charles and God, it was just unfortunate that that relationship did not end in the Graham Greene End of the Affair way I was hoping for

I think the whole point was the relationship with Charles and God. The other relationships were experiences on the journey.

I loved Charles and Sebastian's relationship! So much fun!

The relationships are so different.
With Sebastian, the story celebrates the carefree days of youth, and as it changes, how both Charles and Sebastian react in different ways to the necessary death of such a way of life.
With Julia, it is far more complicated (worthy of several essays), as befits the adults that Charles and Julia have become.
Both relationships are Charles striving to capture the essence of something he cannot define - the same instinct that set him to paint, and then to travel to ever more distant and exotic places... to capture something he cannot define.
And perhaps at the end he understands what he was searching for, and realises it is something unattainable, but he has learnt enough to be, if not happy, then content.
So to answer your question - I cannot choose, because both are essential at different times of life.
Sorry - every time I think about an aspect of BH, I learn more, and if I were to write an analysis,it would be longer than the book itself. This is why it is such a fantastic novel.

I thought the book got better during the second half...much more mature with more depth. And I was also reminded of The End of the Affair. :)

What about Lady Marchmain? She's pivotal to the book, even though she dies partway through. No one seems to like her, except, perhaps her two daughters and the older son. Sebastian and Charles seem to have it in for her, even though she seems to be doing the best thing she can to help Sebastian.