 If you liked
Date A Live
|
 ...then you might like
Hundred
|
Date A Live is another cheesy mecha harem. I prefer Date A Live because Date A Live doesn't even pretend to take itself seriously...ever.
Both Animes involve life from space, with Hundred being a bit more ecchi, and Date being more romance. In Hundred, they fight aliens with technology and the mc uses the girls around him for assistance. In Date A Live, the girls are "aliens" themselves and it's the mc's job to tame them with his own abilities of winning a girl over. Both Anime use what happens in space as key plot points in the story.