This is a rather personal question you have asked of people who are not acquainted with you. As far as what area of chemistry you should pursue in your studies, I would advise you to look at the different areas and find the one that appeals to you, and the one you seem to understand the most. If you have no real preference between the disciplines, I will tell you that in my experience there are generally only two things that chemists with bachelors degrees end up doing in industry. There is a high probability that you will either be making something or testing something. In industry, synthetic and analytical chemistry are very important. While these concepts can be applied to the four areas of chemistry differently, they are none the less the basis of many marketable skills in industry. If, on the other hand, you decide to persue a career in academics, the more abstract and theoretical dimensions of chemistry will be very important.