not too light...not too heavy...
You've probably tried these but just in case:
my list would include Julian Barnes - maybe "Metroland". it reminds me a little of The Rotters' Club. Alan Hollingshurst's "The Line of Beauty" is also a bit Rotters', but with more shagging.
Ian McEwan - "Amsterdam" or "Enduring Love".
And "The Go-Between" by LP Hartley - about a man reminiscing on events of his turn of the century childhood. It's an easy read, but deeply moving.