If you liked the Banner of the Stars II anime, the Anime-Planet community thinks you'd like:
In the year 2075, humanity has spread to the stars, along with their technology, colonies, and... waste? At such great speeds in orbit, even a tiny bolt can cause a tragic disaster. Enter the team of the half division. Their job? To gather the garbage and debris that circles the Earth, in order to keep space safe. From broken-down satellites to bolts and nails, there's nothing that the underpaid and underappreciated staff can't salvage. Join Hachimaki, Tanabe, Fee, and the rest of the gang as they risk their lives to keep space clean, and keep their wallets... empty.
Both PlanetES and Banner of the Stars II are captivating space/adventure dramas that wisely place the focus on character development and relationships rather than extended action sequences and CG spacecrafts. Scenes are rife with quick, conversational dialogue that feels natural rather than scripted, allowing the viewer to feel as though they are taking a glimpse into the character's lives rather than the characters putting on a show. Both PlanetES and BotS successfully provide an examination of the vastness of space and the need for human beings to conquer "the last frontier."
If what you liked about Banner of the Stars II is the well-conceived sci-fi world with leanings towards realism and detail, then definitely watch Planetes. More than that, Planetes also has a strong focus upon interesting, unique characters with highly immersive stories to tell. Although Planetes is more of a 'world of tomorrow' type series with ordinary human beings rather than aliens, it is also a successful sci-fi with an impressive level of world detail and cultural development.
Three years have passed since the Four Nations Alliance declared war on the Abh Empire. With both sides decimated by the first encounter, the lull in violence has provided enough time to build fleets massive enough to span the entire galaxy. Just before the Abh complete preparations for their conquest, however, the Alliance launches a pre-emptive strike, forcing them to take the defensive. Now in command of her own ship, Lafiel is assigned to the fleet as a destroyer captain, and eagerly awaits the opportunity to prove herself as a true Abriel. But when a new class of enemy ship appears on the front lines, the tides quickly turn for the worse. With her vessel now little more than cannon fodder, her dreams are turned into a desperate race for survival - can she and her crew survive amidst a battlefield of endless death and destruction?
In the distant future, mankind has mastered space and spread empires across the galaxy. While many choose to colonize distant planets, others choose to remain amidst the stars, ultimately giving rise to a new brand of humanity known as the Abh. Both genetically and culturally different from their Earth-dwelling peers, the Abh soon find themselves engaged in a bloody war that rages across hundreds of planets and set out to restore peace by means of conquest. Enter Jinto, a nobleman and ambassador of the recently acquired Hyde system whose duty is to represent his peoples' interests and rule on the Abh's behalf. In order to be officially coronated to this position, a cold-but-beautiful Abh princess named Lafiel arrives at Hyde to escort him back to the empire's capital. When they are suddenly attacked by an anti-Abh liberation front, however, the festivities are cut short, and the two must flee for their lives against all odds.
The war between the monarchical Galactic Empire and the democratic Free Planets Alliance has raged ceaselessly across the galaxy for over a century, with the fleets of both powers having fought countless battles. Currently the conflict revolves around the strategic Iserlohn Corridor, one of only two passages of space through which the two forces can access each other. Here the Empire has built the nigh-impregnable Iserlohn Fortress, whose deadly weaponry has thwarted repeated efforts by the Alliance to capture her. Phezzan, a neutral mercantile state, controls the other corridor. The long war has resulted in an indecisive stalemate, but there are two men from the two worlds who will change everything: Wen-Li Yang, a gifted strategist from the Alliance who wants nothing more than to retire and be a historian; and Reinhard von Lohengramm, a man from the Empire whose ambition knows no bounds. Their loves, struggles, triumphs and failures play across an interstellar stage of intrigue, war and death.
What could be better than Banner of the Stars II? Legend of the Galactic Heroes, of course! Not only is the world concept highly involving, with lots of strategic battling, the politics of LOTGH is just stupendous. Moreover, like Banner II, the characterisation is out-of-this-world excellent. You thought Jinto and Lafiel were the best sci-fi could offer? Then wait till you see Yang Wenli and Reinhard von Lohengramm (amongst others). LOTGH is simply an epic, intelligent, gripping political sci-fi with a intriguing vintage world concept. If you really liked Banner of the Stars II, you'll regret not watching LOTGH.
It is the year 2356 AD, 189 years after a shockwave from a distant supernova decimated the Earth. Since that fateful day, humanity has begun training for a final mission to protect the planet from the inevitable oncoming 2nd shockwave - a mission whose failure means the annihilation of mankind. For Katase and her friends, their training at the foundation Stellvia is just the beginning of an adventure that could lead to saving the world, or seeing its end...