I tried to read something by Gerald Durrell's brother (what was his name again?), because my clever friends were reading him, got to a bit where he's describing a little girl skinny-dipping and he mentions "the white flash of her purse" - I thought "uh-oh, this guy's a paedo" and dropped it. (Subsequent revelations, actually, suggest that I was right.) Anyway, I'll stick with "My Family and Other Animals" thank you!
As for sci-fi, I used to love Kurt Vonnegut - quirky, humane and moral in the widest sense.
And I once read a lovely novella by Judith Merrill, called "Homecalling", about two children marooned on a strange planet, and their interaction with the local aliens, who are hideously ugly but kind and intelligent and organised like a bee colony. I've been looking for something else by her but never found any; has anyone else come acros her? Oh and of course there's Naomi Mitchison!