>>22102361I tend to just play without any enhancements because I have a lot of nostalgia for the PlayStation and generally prefer to play stuff the way it originally looked. Especially for stuff like Resident Evil and the Final Fantasy games where you've got polygons moving around on pre-rendered backgrounds; I find the high res models against the low res backgrounds a little jarring for my tastes.
When I do tweak stuff though, pretty much everything I care to change is on the Enhancements tab. You can change the internal resolution up top for higher resolution polygons and mess with the PGXP settings at the bottom to get rid of that signature wobbliness that every 3D game on the console has going on. You can even force widescreen and progressive scan for stuff.