I very specifically bought a PSP off of someone in college just for portable emulation (and Mega Man Powered Up). From there on I ended up mostly playing a lot of Mega Drive and SNES games on the go in between classes, and it was the system I would eventually play all the way through Snatcher on. A small hand held with Snatcher felt perfect, additionally PSX emulation utilizing its own built in emulator was ridiculous.
After that I would end up primarily using the Wii once I was out of college and not leaving the house as much. It was nice having a little set top box that “just worked” instead of attempting to hook my old computer up and mess with controller settings (what I do now, minus the fuss thanks to Steam’s controller support and RetroArch).
Much later on I’d end up with an Nvidia Shield Portable from a GDC trip, which was a beast for portable emulation at the time, and was able to run up to N64 emulation smoothly! The nice built in controller was super comfy too. It’s too bad the screens will eventually fail on them and Nvidia seemed to have had no interest in doing something like that again with the Shield line outside of a tablet.