 If you liked
The SoulTaker: Tamashii-gari
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 ...then you might like
Bakemonogatari
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Both have unique design and color setting and make use of unusual camera angles and animation style. This due to both have in their staff Akiyuki Shinbo as Director and Akio Watanabe as Character Designer.
Plotwise we have a few similarities, since it follows a boy, who happens to encounter some girls during his journey.
There's also a side character who helps the protagonist in some way, Shiro Mibu in Soultaker and Meme Oshino in Bakemonogatari.