I am a math researcher working in number theory. During my college years I heard all the stories of great mathematicians, icons of the subject who dedicated most of their time to mathematics research (think Gauss, Euler etc). And that motivated me. I always seemed to do well in math at college. I secured top ranks at graduate and undergraduate exams. I cleared the national entrance exam in mathematics (CSIR, India) and got admitted into a Ph.D. programme. Now that I'm pursuing a Ph.D things are not as I had envisioned. There are days where I just don't feel like it. Some parts of math are hard and it seems like a drag. Also I conduct classes thrice a week which I am not enthusiastic about and on some days I just don't wanna do it.
I have this idea of a perfect job where you come in to work everyday and are captivated by what you do and everything just flows. But that's not what I am experiencing. Is this normal? I’m confused. Its not like I have lost interest rather that I'm not as in to it as I would like to be.