was it worth it or a waste of time?
It was worth it, but not for acquiring practical skills. I think going to college is an invaluable life experience that you simply can't get elsewhere. Also you have to understand that the point of university is not necessarily to learn everything about everything, but to gain the skills necessary to participate in critical thinking.
what did you major in and is it helping you in your career today?
Immunology, and I am currently working in biomedical research in the same field, so yes, it helped in my career in that it directly decided it. But I also enrolled in a post-graduate degree after my bachelor's.
would you major in something different given the choice today?
I always wanted to major in art history, and it's something I would like to know more about. I'm actually going to probably make a career move shortly, because I've been working in research and development (of cancer drugs) and so I've a good grasp of patenting, and I'd like to go into IP law. Essentially I am interested in finishing up a couple of my major research projects in the next 12-18 months and then go to law school. In a way then, my original major will help me, as there is high demand for research scientists in pharmaceutical IP law at the moment.
Did you go with what you enjoyed when choosing your major or did you go with what you thought would make you the most money?
Neither, actually. I studied something which I felt was my greatest strength - science, and I found a sub category within that which I then pursued.
Also any advice for someone who is not sure on what to major in would be appreciated.
There are two kinds of people - those obsessed with professional programs because they just want a guaranteed job with a good income. If you are such a person, go into law, medicine, pharmacy, dentistry, engineering, etc. If you are interested in academics, go to graduate school, but be aware that there is absolutely no money in academia. Then you have the people who don't know what they want to do, and they have to find that out along the way. Most people I know who really gave a lot of thought to what it is they loved and wanted to do did so after graduating and spending some time in the workplace. Don't be scared to go back to school later or change your path.