Half of the field is viable thanks to a single algorithm: FFT

ME TOO!

I feel like the signal processing community is really passionate about their work. It comes out in their books. I know I can talk for hours and hours and hours about signal processing. And my DSP professor was like that too. That was such a fun class.

I had that during my second year of master's. I barely understood it and the rest of the class couldn't understand it at all. I wrote my exam and forgot 99% of it a week later.