Had the PS1 plugged in and going again for a few weeks. Been using the framemeister since I've just got a flat screen setup at the moment, big CRT's in storage. Ended up having to get a decent shielded Euro SCART cable since I was getting faint video noise that becomes noticeable when blown up huge on a TFT, but mostly because I was getting crosstalk from the video on the audio outputs. Really annoying buzz that varied in direct proportion to how bright the screen was.
Did a big nasty mod of an LS-40 into an old dirty arcade stick, feels great now. Haven't really touched the buttons yet, just switched around the arrangement with some cut'n'jump soldering. They're the annoying type where the plunger and receptacle are mounted to the shell, but the switches are all soldered to a big PCB. Means you can't just pull and replace with sanwa's etc without doing surgery. I've done it before but it's a pain in the ass, generally proportional to the number of buttons.
Gameplay wise I've mostly been playing Castlevania: Symphony of the Night and Metal Slug 001 (JP). Pretty good. I could write a bunch about those but this post is long enough, maybe later.