What I meant in the title is Theoretical Physicist (character limit). A year ago, when I decided to get a Physics bachelor degree, I was 100% sure I'm going to do theoretical research. Since high school, I was always searching stuff about particle physics, relativity and other topics on the internet, out of curiosity. What I wasn't sure about is the type of work I would be doing, and it didn't matter, I just cared to pass the year well, because I'm studying abroad (France). I wasn't quite sure what an engineer does - I thought it's much about architecture, technical details of devices, which I didn't find very attractive. Now I found out about a job called Design Engineering - and I instantly got curious about it. Truth is, I always liked drawing and, as a self-taught designer, in high school, I even tried to work as a Freelancer (not gaining very much from it because I was competing with professionals, but it's still an experience). Design engineering requires a degree in Industrial design - which I won't have. However, I found out thet Engineers also deal a lot with design, especially Mechanical engineers, combining it with a lot of math and problem solving. I found out that it is possible to be the one with a concept in mind, with a good design, to search the optimal solution in terms of cost, materials etc to make it work - I find it just perfect for me! For me it seems like being an inventor, and actually being able to apply your ideas to reality. However, here's the problem: I don't want to leave theoretical research aside. I have a powerful inner drive that makes me question about the nature of things, sometimes questions pop out out of the blue and I can't sleep until I find a solution. I really want to be able to understand QFT, General Relativity and even String Theory maybe - though I know it would require years and years of study. Why don't I pursue my studies in Theoretical Physics then? Well, I just don't see myself as a professor, or even constantly doing research in particle physics. I'm the type of person who needs diversity, if I do something requiring analytical thinking, problem solving I need to do some drawing or writing after, otherwise my brain just won't work. That's why I think Mechanical Engineering will provide this type of diversity, however it won't fulfill my curiosity about the nature of things. These are the reasons why I'm asking: is it possible to be an Engineer and, also, a good Theoretical Physicist? I am good at math - and, about hard theoretical concepts, the only problems I see are time and approach, not negligible though. Especially time. If I'll choose a career in Mechanical Engineering - will I have time and energy to study physics, at a high level? Now, for the second year of university, I must choose a path: Physics or Mechanical Engineering. If I choose Physics, I will have less chance to be employed as an Engineer, because ME graduates studied design and materials, more practical stuff. If I choose ME I will have little or no chance to be accepted for a Master degree in Subatomical physics (or Condensed matter, but the first is more appealing to me), which opens the path to a PhD. I just don't know what to do. I will highly appreciate any suggestions, ideas or life experience.