Most games, generally? I'm honestly fine with most games visually, I especially like the pre-rendered backgrounds from the PSX/Saturn/PS2/GC eras [that Capcom were masters at] and some of the PSX games like Metal Gear Solid, Koudelka, Resident Evil 2 & 3, Galerians, Mega Man Legends and Vagrant Story all still look visually good to me.
And pretty much all pixel art games still look great to me, no matter the era. And like 80% of the stuff I play on PS2, GC and OG Xbox still look good to me too. Just because the newest games look good doesn't just make these old games suddenly ugly or anything. I still think the likes of FFXII, MGS2, MGS3, Wind Waker, Odin Sphere, Trapt, Breath of Fire V, Steel Battalion, Fatal Frame 3, Otogi 1 & 2, Forbidden Siren 1 & 2, Zone of the Enders 2, killer7 and Digital Devil Saga 1 & 2 are all still genuinely great looking games; it helps that the artists who worked on these games are exceptionally talented.
I tend to find I go for more dark, gothic aesthetics and "dated" horror games actually enhance the horror atmosphere for me. Leaves more to the imagination that way.
Koudelka:
Forbidden Siren:
Fatal Frame 1/Project Zero 1: