True, especially in their initial appearances in ST:TNG. However, DS-9 changed that. I always got the impression that despite the best efforts of the writers, Quark and Co. usually managed to steal the show in the episodes in which they were featured! They were more human than the humans!
Indeed. I also preferred the Klingons to the humans. Humans seemed unable, except under extreme circumstances, to break out of this tediously wholesome mould of behaviour. It was, well, inhuman.
Regards, Ivan