Interesting poll, but very heavy on specifics for non-period monitors and completely lacking for period CRTs.
What about:
- 4:3 or widescreen (yes, widescreen CRTs were a thing, look up the Sony GDM-FW900 for a prime example)
- curved CRT screen or flat CRT screen
- shadow mask or trinitron/diamondtron tube
Screen diagonal and horizontal scan rate also spring to mind - back in the day most people had <=15" things with less than 50kHz horizontal scan (so you could suffer with 1024x768@60Hz, but really 800x600@75Hz was about the best usable setting). I'm 'period' enough to use a CRT for retro stuff, but not that much of a masochist, so I have a nice 17" Iiyama HM704UTC from 2001 with flat Diamondtron tube and horizontal scan up to 96kHz. Somewhat anachronistic when paired with a 486, but we all have our choices & concessions. Others would choose to go with a 14" aquarium tube and fuzzy wobbly picture, but I had enough of that from 1987-1999 and don't want to go back - but I'd be interested to see how many choose what when it comes to their CRT.