Nowadays I use a lot of Iosevka. Previously I was on Ubuntu and JetBrains Mono, both are great fonts. A bit of PT Mono as well, even Terminus for a bit. One of my favorites has got to be Liberation Mono though - the most readable font I’ve ever found, even if Iosevka lets me put more stuff on screen horizontally. Oh also I’ve started enjoying Cascadia Code recently, surprisingly pleasant.
Yeah I was disappointed that Cascadia was not in the fonts on the site. What won me over for Cascadia was: I decided to try it for a couple weeks. By the end, I was certain that Cascadia must be larger than my previous font because it was so much easier to read, so I opened two terminals side-by-side and counted the rows+columns that fit between my old font and Cascadia. To my complete shock, Cascadia fit a couple more lines on my screen, indicating that it was actually _smaller_ despite being easier to read.