I doubt this is my alltime best moment, but I recently beat Donkey Kong Country 2 102% without dying in less than two and a half hours. That's a bit of an achievement. my record is 2 hours and 15 minutes.
My Console Library:
PS5, Switch, XSX
PS4, PS3, PS2, PS1, WiiU, Wii, GCN, N64 SNES, XBO, 360
3DS, DS, GBA, Vita, PSP, Android