Okay, so you meet this guy. You think he's attractive and his initial personality really clicks with yours. He asks you out on a date and you agree. Weeks later, you two are officially a couple...

You start to really get to know him: learning about his life, visiting his apartment, shopping with him, eating at restaurants with him, even spending the night with him. A few more weeks roll around and you soon realize different things about him that bother you, just little things that anyone can work on (like chewing with one's mouth closed, not saying certain words or phrases, wearing deodorant, keeping one's room neat, not wearing socks to bed).

Should you try to change him?

How much is too much?

Once he has changed to your specification, will he still be the same guy you fell for?

Is the reason why the relationship has lasted as long as it has is because changing him was a challenge for you and once it's over, you're ready to find your next conquest?

In general, I believe that in relationships, people grow and people do change (but is that change better for him or you?).