SolaFide posted... The Romeo and Juliet, star-crossed lovers theme they were going for with Noctis and Stella seemed much more interesting than whatever they were trying to do with Noctis and Luna. Stella also looked better and had a better weapon that she looked like she was actually going to use in the game (a rapier).
^this
I feel like Stella exhibited more of an action-girl vibe than Luna. While I loved Luna's personality (reminded me of Yuna), her character development was non-existent and hard to understand without outside sources (brotherhood anime/Demos/
KINGSGLAIVE) to the point that the only thing people remember about her is that
she was killed like Aries. As such, the way Stella was posed (not promised, per se) to be more action oriented was a huge boon to her likeability. Especially after the Kingdom Hearts fiasco of never having a strong female character (barring Aqua, who at the time had not been given the "worf" affect she was in later games) Stella looked like a breath of fresh air...
...then Luna (whom I like) was presented as yet another Kairi-in-destress. So yeah, the thing is less that people like Stella as a character and more they like her as a concept. Usually, hand-in-hand with one's feelings on Luna.
"What I do, I do, with no regrets"
-H.S.Yuna