I read the same plots all the time. It's frustrating. The following is a list of the most recent (and common):
1. I thought you were hot, kissed you, was discovered by my parents in a compromising position, became ruined as a result, shunned by society, thrown out of my house, forced to become a teacher at a YOUNG LADIES OF THE TON school and now, 10 years later, meet you at said school, where your niece/sister is a student. We fight, make love, fight, break up, and finally get together after what feels like a zillion years (for the reader).
2. I promised my dead soldier friend that I would take care of his sister. I go to his home, meet her, fall in love, but refuse to admit it. You refuse to believe I might love you because you think everything I do is dictated by the promise I made to your brother. Ending is same as #1.
3. I need a bride; you need a husband...we agree it'll be a marriage in name ONLY. We are attracted to one another though, which is good, but it's only lust. I'll even sleep with you day and night...monster sex marathons. I'll be possessive and jealous of anyone who looks at you, but love? Nah, not for me. You see I'm traumatized because my mother was a ho and treated me shabbily. I cannot love and I never will; I don't want to be like my mother; I don't deserve love. I don't.
4. We're caught in a compromising position. We marry. Lots of misunderstandings. I'm a rake, unwilling to admit I'm in love. You're a bluestocking. You want your independence and will not forgo it to a man. You love helping the less fortunate, especially prostitutes. I hate it because I'm a duke and if anyone were to find out that my duchess does this, then I would be ruined and lose my place in Parliament or lose the respect of my peers. Whatever...eventually I end up financing a home for these tramps!
I don't mind these storylines...I really don't. Some authors take them and deliver a masterpiece...others though butcher them beyond belief. It's with these authors that I have issues. My personal favorite is the redeemed villain which tends to take on different plot twists. He's never truly evil, just misunderstood. I'm still waiting for an author to redeem a truly evil villain. I guess I'll just have to keep my fingers crossed.