Right now I'm a 2nd year biology major, focusing on neurobiology. During my first year I noticed that biology outside neuroscience and some physiology doesn't really interest me that much. So I started taking some maths and programming already during my 1st year. Now I'm taking mostly maths and doing some bio courses on the side, and in the spring I'll have only physics and maths. Right now I'm taking Analysis I and a "physics maths" course on which we've gone through basics of all kinds of useful mathematical methods (calculus, some vector analysis, differential equations etc). I've been enjoying it all. My motivation to study has never been this high and I've gotten good results. The maths courses and some programming I did as a hobby made me realize that I really enjoy doing maths and programming. I'd like to do more theoretical stuff (mathematical modeling, maybe simulations etc.). I understand the importance of experiments, but I've always felt that I wouldn't enjoy being an experimentalist (doesn't mean that I absolutely want a fully non-lab job). All of this made me think that maybe I should take a second major from maths or physics. But I also have considered switching majors to maths or physics and doing minor in neurobiology. I don't yet really know if I'd like to focus more on (applied) mathematics or physics (trying to figure this out while taking the basic maths&physics courses). But it's very certain that I enjoy solving mathematical problems much much more than reading about biology. Now to the question: would a major in neurobiology benefit in the field of biophysics/theoretical neuroscience/something similar? I feel like the biology related to those fields is much easier to pick up than the maths and physics. If that's the case, I probably should drop the bio major rather than doing double major. Plus, if I fail to combine these subjects, I'd rather work on something maths/physics related than non-quantitative/experimental biology. I'd also like to mention that in my country the standard route to PhD is to go from BSc to MSc and then PhD. I'm in a BSc+MSc program, and it's possible to do one BSc and then two MSc degrees in two different majors.