Total Recommendations: 2
If you liked
Steins;Gate
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...then you might like
Boku dake ga Inai Machi
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Both involve time travel and heavily feature attempting to change the past for a better outcome. Erased focuses more on mystery and the changes Satoru makes as he relives his life while Steins;Gate centres more around the close relationships between Okabe and his lab assistants.
If you liked
Elfen Lied
|
...then you might like
Mirai Nikki (TV)
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Both share pink haired female MCs who have questionable sanity. Both have lots of gore and romance.