Seikai saga, 4 series/seasons so far and some side stories.
Crest of the Stars (Seikai no Monshou)
Banner of the Stars I (Seikai no Senki I)
Banner of the Stars II (Seikai no Senki II)
Banner of the Stars III (Seikai no Senki III)
One of the best character development, on par with Monster (psychological thriller though). Scifi: aliens & space. Has romance but quite subtle.
A bit of fantasy too perhaps -- space elf.
