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?
Gonna be controversial and say Metroid Prime Hunters… mainly because that’s the one I’ve spent the most time with.
Zero Mission takes a close second, though.
Used to play pvp on metroid prime hunter all the time in middle school