Responses to things I'm tired of hearing

It's happened. I've reached the point where I can't just shrug off certain phrases that I hear on a fairly regular basis.
Last week, a guy hit on me while I was at work, and instead of just doing the standard, non-committal shrug and smile, I just stared at him with the cold, dead eyes of an unamused woman.
My maximum bullshit tolerance has been reached, and as such, I am providing some of my favorite responses to the most obnoxious pieces of bullshitery I hear. Some of the responses, I have used. Others are things I thought of later (I hate when that happens!).

1. "You're so pretty when you smile. You should smile more." Or any variation thereof. 
Ugh, you're pretty when you shut the fuck up. Or: I'll smile when you leave because then I'll be happy. Or that time when the cashier at Costco told me to smile and I said: "Well, I would but I'm pretty sure smiling is your job and not telling your customers what to do."

2. "I really couldn't care less that you're bi. It really doesn't mean that much to your personality." 
Fuck off. Also, I'm not bi, I'm pan, so go fuck off some more. Oh, and my sexuality means A LOT to my identity so when you say that you "couldn't care less," I'm taking that to mean that you couldn't care less about me as a person. Which means, you guessed it, FUCK OFF.
Oh and when I told said person this, his reply was: "Well, you're a bitch and that makes you a bad person, not your sexual orientation."
My response? A smile :)

3. "You're so pretty why don't you have a boyfriend?" 
Unamused face.
Oh, and thank you sooooo much for caring about my personality. Because apparently I'm a bitch.

4. "Have you ever considered being nicer?"
Yes, but then someone's an asshole and it takes way more energy for me to be nice than it does for me to be a bitch. If I need to apologize for said behavior later, I will. But I'm not going to alter my personality for someone who is acting in such a way that hurts me.

That's all I have for now...If you think of another insufferable phrase or sentiment that I didn't list here, feel free to let me know and I'll respond :)