Board Thread:General Discussion/@comment-24682793-20140523132734/@comment-5553481-20140614104836

Yes, Ichigo is a special case, due to him being born as, technically, a visored, unlike the other who were forced to go through hollowfication process.

On a side note, Sternritter M, every so called "inner hollow" is actually a zanpakuto, quoting: Hollowfication is the act of inserting Hollow Reiryoku into a Shinigami and using it to destroy the boundary between their latent Hollowfication and Zanpakutō, merging the two in the process and turning the original soul into something more powerful. -http://bleach.wikia.com/wiki/Hollowfication#Overview