User blog comment:Tierhalibelbrylle/Love Interests, Anyone?/@comment-25763181-20140409100350

For Reiku Hogosha, it's simple.

The more similar the girl is to him, the better.

There are other circumstances where he would go after a girl but it's simply too complicated to put here. And looks aren't even close to the top of the list, just so it's out there.