Cliché openings in fantasy can include an opening scene set in a battle (and my peeve is that I don’t know any of the characters yet so why should I care about this battle) or with a pastoral scene where the protagonist is gathering herbs (I didn’t realize how common this is).
In romance, I can’t stand this scenario: A woman is awakened to find a strange man in her bedroom—and then automatically finds him attractive. I’m sorry, but if I awoke to a strange man in my bedroom, I’d be reaching for a weapon—not admiring the view.