What's the lowest level of graphics you still find acceptable?

[UnderstatedCornHole]

I want 60fps, nothing else really matters.
From the PS1/Saturn until now, I'm sick of developers pushing too hard and giving us crappy frame rates in exchange for eye candy.

I like those indy style retro shooters on PSN for example like Resogun.

Smooth, crisp, dynamic and CONSISTENT!