I played some of the original Legendary Starfy on GBA, (just the first title) then I made it half-way through the one that was actually localized on the DS. It's an okay series, but it feels too monotonous. After completing a few stages, there's no motivation to keep pressing on, and the story doesn't conclude by the time I've already seen all the game has to offer. There's not enough diversity in any area of the game. I liked the bonus option of dressing up Starfy in ridiculous outfits in the DS version, but that's about all that could hold my attention.
Let's see... Someone recommended Baldur's Gate. I have it, and actually have a level 40 (max) Elven Fighter save file. (second playthrough) Too bad there isn't more to do in that game.
Mega Man Zero - I never could get into Mega Man. I tried to play some of the classics, then X6 on PS1, then some of the Zero games. It seems like it would be right down my alley since since I like Metroid. I can't explain my disinterest. One of the games I played was simply too frustrating, though. I had to keep up with this whole ranking system, then something about collecting "Elfs." Being a perfectionist, it was just too difficult for me to achieve a perfect score on every stage and simultaneously keep track of any items or power-ups that could be permanently lost or missed. I like challenging games, but there's a distinction to be made between challenging and demanding.
On a similar note, I didn't like Sword of Mana for the same reason. Trying to collect everything is a complete nightmare. I don't plan to confine myself to a particular location of the game for 20 hours at a time just so I can go around harvesting thousands of enemies for my bestiary. (when you defeat 999 of an enemy, it's replaced by a superboss version of itself) What's more, there are very rare enemies that appear only at a rate of 1/256 or so. Trying to collect just one instance of that enemy for your bestiary can take hours. Because it's impossible to return to some areas after leaving them, that makes certain bestiary entries (and superboss enemies) permanently missable.