Totally agree. Knowing what you don't want in your life is just as important as knowing what you do want. It helps in narrowing down the loads of choices and pick one that best suits you and your personality.

So, never define yourself with that one phase or failure in life. Because, everyone is going to fail badly someday or somewhere.

Yup. True again. Just because you've had a couple of rough days doesn't mean your life is trash. It simply means that it's life. It's like a video game: If there are no problems in your life, then you are not really living it.