Gundam SEED is like every other Gundam, about mechs fighting in a war. If you really don't like that concept, then you won't like SEED. If you just didn't like Wing in particular, I think you'll find SEED a refreshing change. The characters in SEED are better developed and make a lot more sense. They don't break down into babbling incomprehesible statements about soldiers, war, and honor. The guys in SEED are fairly normal personality wise and have normal person worries and fears. That being said, SEED doesn't have anywhere as much political intrigue as Wing. I like to think they realized that good characterization makes a better story than political intrigue does. Finally, SEED has a lot of style going for it. The character designs, intros, and outros are just cool. It is my personal favorite anime.