I personally always liked classic rumble features in most games and the Dualsense just made it 10 times better. Just finished Act 3 on Returnal and wow, that game shines with the Dualsense. Looking forward to Ratchet & Clank now.
I knew a girl growing up who really liked the rumble test in Metal Gear Solid. It was the only game she played as it were. As for me, haptics are something I never really notice.