My favourite Metroid game has got to be Zero Mission on the GBA.
A weird choice maybe but it was my first metroid when I played the GBA, I thought the music and atmosphere was kick ass and enjoyed the simple enough controls.
For a 3D Metroid it would be the trilogy on Wii at the time.
What about you?
It’s super cool that SMZ3 is a thing that even exists, but beyond the novelty of it I felt it was dragged down by the fact that ALttP is so much bigger than SM, to the point where it kinda drowns SM out.