If you liked the Angel Beats! anime, the Anime-Planet community thinks you'd like:
Rikka Takanashi is a teenage girl who possesses the strongest ocular power known to man: the Tyrant’s Eye. She's currently locked in a fierce war with a shadowy organization, and the fate of the world may hang in the balance with each passing battle... or at least this is what she believes. In actuality, Rikka is merely a normal high school girl afflicted with chuunibyou syndrome, a "disease" that makes one prone to delusional flights of fancy. Meanwhile former chuunibyou sufferer Yuuta Togashi is enrolled at the same school, looking to put his embarrassing junior high exploits behind him. However, when Rikka discovers his past life as the "Dark Flame Master", she uses this to her advantage to include him in all of her wacky schemes! With Rikka’s zany behavior dragging him further and further from normalcy, Yuuta must try to pull her back into the real world – or risk getting sucked into hers!
The only reason why I thought of Chuunibyou Demo Koi ga Shitai! while watching Angel Beats! was the male lead. It might not seem like that much of an excuse to write a recommendation, but I believe that such characters are rare in shounen and seinen manga. It's difficult to describe what kind of characters they are, but if I were to try, I would say they know what is the right thing to do and they follow through. They are someone others can depend on. If you liked the male lead in one of those series, then be sure to check the other series too.
When his dream career as a basketball player is shattered due to a severed tendon, Okazaki Tomoya believes that his already depressing life has lost all purpose. To make matters worse, he is plagued by dreams in which he wanders through a land of nothingness. Attending school only through force of habit, Tomoya one day meets a girl called Furukawa Nagisa; and over time, while helping her to reform the school's drama club, Tomoya learns to smile and have fun once more. His dreams have become less dark, as though a ray of hope has appeared; but could there be more to these dreams than there appears to be?
Also, I recommend the rest of the Clannad series (in the scenario that you've already watched Angel Beats!). If you're going to watch the movie, watch the first Clannad anime season first to get the story the best. Both are very touching/moving series while being heart-warming and playful at the same time.
A boy arrives in purgatory after dying, where he is informed that in his past life he committed a terrible sin, and cannot be reincarnated until he can remember what it was. Until he does, he is placed in the body of a middle school student named Makoto who committed suicide three days ago, and is instructed to live the deceased boy’s life. New Makoto quickly becomes fed up with his host body's situation, as the boy doesn't have any friends, his family life is in shambles, and his mere presence makes everyone around him nervous. But giving up is not an option, and if the spirit ever wants to move on, he must adjust to Makoto's life and understand what happened in the past.
If you liked Colorful, you may enjoy Angel Beats! and vice versa because both shows deal with death and reincarnation.
However, Angel Beats! focuses more on fulfilling ones unfulfilled dream wihile Colorful deals with correcting the mistakes in the former life.
Hope’s Peak Private Academy is a super-exclusive institute that gathers the best and the brightest, provides them with a world-class education, and propels them into any career they wish. At least, that’s what the average student Naegi used to think. Having been accepted into a class of 15 students through a lottery system, the boy quickly comes to learn that Hope’s Peak is no ordinary school. In reality, he and the group find themselves trapped inside and learn that the only way to "graduate" is to murder a fellow student and fool everyone in a trial that determines life or death! Led by the whimsically-cruel, teddy-bear-like Monobear, Naegi and the others must do whatever it takes to escape this bizarre, deadly game.
While there may at first seem a huge discrepancy between these two titles, the two actually share some pretty common ground.
Both series focus upon a group of high schoolers trapped within an atypical high school and their subsequent efforts to uncover an unidentified oppressor as they try to understand their bizarre circumstances. Furthermore, both series similarly include a large cast of distinctly (and perhaps exaggeratedly) eccentric characters who inject comedy into an otherwise dire situation.
While approached in different ways, both series feature a focus upon life and death, and with their similarities in setting and character project a similar tone. If you're a fan of one series you may well like the other.