It was pretty common at my uni to TeX math & physics problem sets, I had phases of doing both depending on my mood. I usually felt that the one I wasn't current

It was pretty common at my uni to TeX math & physics problem sets, I had phases of doing both depending on my mood. I usually felt that the one I wasn't currently accustomed to made me more careful, so as TeX-ing became too easy I'd handwrite, as my handwriting deteriorated I'd go back to TeX.