Good question. Been playing Secret of Mana since I was 8 or 9. One of my favorite games, its a shame the Mana franchise went to crap.
Have to admit, those collab events inwork and get people to try new games (thanks FFBE). So only SoM and Seiken Densetsu 3 (SoM2?) are worth playing?
Hmm, I'd say that Legend of Mana for the PSX was decent, but it was very different from SoM/SD3. It went in a different (but good) direction. Sword of Mana for GBA wasn't terrible, but it couldn't match any of the ones above. Since then its just been horribly downhill.