Xam'd: Lost Memories
The plot is interesting.The feelings almost as the same as Eureka Seven(Well,aside both of them are from the same character designer).There are characters development (Akiyuki,Nakiami,Haru).Although for me,there are a couple flaw in it such as :-
The length (26 episodes) kind of too short to really explain the whole matters(Xamd,Tessik Village,Southern/Northern Government,the Zambani crews background etc).
There not much interaction between main characters Akiyuki and Nakiami.(Less than 10 episodes they were together)Well,not a bad thing I guess.It's like 2 different point of view on the same matter.