I voted for the last option in the poll. It took me a while to be *sure* I wanted my Ph.D. In the end, I realized that I would regret not doing it, and I don't want to have that regret. I am in love with doing research, and in the biological sciences graduate school is mainly about doing that research and getting paid to do it. Moreover, being paid to learn more about my field and not having to worry about paying the bills is like a dream come true after the struggles of putting myself though undergrad. Lastly, being accepted to a program with full funding for the next 5-6 years, well, you just can't beat that kind of job security in today's economy.