I picked Lunamaria.

What I've seen of Meryin I like, but it hasn't been enough yet.

Stellar was too mentally retarded for me to really enjoy as a character, way too one-dimensional and shallow.

And, as most know, I absolutley think Lacus Clyne is ruining the entire Seed franchise. Her speeches are vague drivel (and Kira has started speaking like her too) about impossible ideals that they often contradict later on. She also has made episode 46 and 47 focus on her knock-off, Meer Campbell, who was an interesting idea and actually isn't the worst choice to do a "character profile" episode about, until you consider the fact that there's only 3 episodes left and many important things haven't been covered at all!

Wish I could put a negative one in Lacus' score, rather than vote for Luna...