Oh yeah, Soul Reaver is pretty nice still.
Perfect Dark is still pretty entertaining to me as well as other N64 games!
For some reason, there is something in Mario Kart 64 that brings me back to it even if later games have remade many of the tracks and stuff.
Mario Kart 64 is definitely flawed. But man, I keep coming back to it too, it's just simple Mario Kart fun, with the best battle mode (until Mario Kart 8 deluxe most likely). It's mainly nostalgia though of course and Toad had the best voice back in the N64 days. Way better than now.