When I’m just checking something out quickly or I’m taking screenshots and footage for SHIRO!, I use the Bizhawk emulator on my PC.
If I’m sitting down to properly play a Saturn game, or of course if I’m going to play online via NetBand Tunnel, I’m playing my real Saturn hooked up to a CRT. I use either a real disc or a bin/cue on Satiator.
And sometimes I play on my MiSTer with single RAM hooked up to our 4K TV to test out new core builds, or I play on the Yaba Sanshiro emulator on PC to investigate how a game is displaying graphics or to rip art assets from it.