Besides the mistakes that are pointed out, I love the way readers become involved with the characters. When readers start asking about character motivations instead of concentrating on the special effects, it means you're connecting with them on a personal level.
Alan Dean FosterIn one book, CACHALOT, just for my own amusement, every character is based directly on someone I have known.
Alan Dean FosterWe're all nothing but unified arrangements of atoms and particles, drifting around, enjoying consciousness every now and then for a second or so before splitting up to become bits and pieces of trees and stars and french fries.
Alan Dean Foster