Originally Posted by HarryT
I used to like Asimov when I was a teenager, but reading him as an adult I have to admit that I find his books rather shallow. His characters are all rather two-dimensional and don't really come across as real people.
For dimensionality (!?) one might try The Gods Themselves
For real people The caves of steel
I also read them when I was young. I re-read them not long time ago (when I was barely 65) and I found them quite charming.