This is a question that comes up a lot in interviews. I would put some thought into this question for those of you who have interviews coming up. You never know if you may be asked. I can tell you that if I received some of the responses I've seen on this thread, it wouldn't fare very well in an interview I sit on.
Just a hint =)
This is a fairly straightforward question, but it is hard to present an answer that is...to say the least, professional.
For example, if you said that you picked pharmacy because you don't like doctors, why not become a nurse? Nurses are the most trusted healthcare professional. Why not become a physician assistant? Hours are flexible and pay is good. Saying that you don't want to become a doctor gives the impression that you think pharmacy is inferior to medicine and a secondary career path. I certainly hope you don't think so =)
Just something to think about.