Today, I want to talk about why career choice cannot be too careful. = Today, I want to talk about why career choice cannot be ignored. I spent 5 years preparing for Korean SAT; longer than usual students because I did not study at all in my school age = days. For = At that time, I had to let many things leave me such as chances to meet girls or avoid not to get thinning hair(In my defence, my hair ‘seems’ to be normal......yet T.T) ( OR At that time, I had to disregard many things such as chances to meet girls or avoid not to get thinning hair.) But there was also something I got from the = that period. I had plenty of time to think about various things since I let myself be far away from people to concentrate only on studying. Especially, I used to think about what should be supposed to be the purpose of my life. = I used to think of what should the purpose of my life supposed to be. First idea was that happiness is so important that it can be the purpose of all. Then, the question may well = also be followed by, ‘what makes me happy?’ Buying anything I want or eating delicious food everyday, which money can bring to me, can make me happy but these are one-time things and are easily gone. The more goods I get, the more greed will appear. After much consideration, I reached the conclusion that self-regard is the best part of happiness because I myself decide how I feel and that self-regard come from what I do and how other people think of me, in a word, a career. Therefore, people should carefully choose their career which can let them consider themselves to be worthy.

At that time, I had to let many things leave me such as chances to meet girls or avoid not to get thinning hair = At that time, I had to disregard many things such as chances to meet girls or avoid not to get thinning hair. [another expression]

disregard = pay no attention to; ignore.