In college, I majored in Neuroscience but after about two year, I really started to resent biologists' obsession with memorization. Moreover, I really started to miss doing math., as I had in high school. So, I double majored in Applied Math., which was a huge amount of work...so much so, that drive almost seems irrational to me now. Yet, I just missed the topic and felt a longing to do it. Has anyone else had a similar experience?