200 page user here. I prefer it because I often lose track of something I want to quote in long threads and can search 4 200 post pages much quicker than 16 50 post pages. I also like it because I use dial-up occasionally and if I need to refer to something said earlier or I need to get offline, I can load a long thread and keep reading offline.
Mine has been set at 200 since What Exit? told me it was possible to do so.
5 seconds ago, 50. Now… 200.
I’ve known about the option for a long time, but I think 50 is a good number. No idea why. Used to it I guess.