User blog comment:Godisme/The Time Discipline/@comment-44061-20110210053054/@comment-1268838-20110210054436

Well, by definition, Fullbring is a power particular to humans, so of course Shinigami wouldn't gain it - but I get your point. The only possible explanation I can think of is that since Ichigo already had Hollow powers at one point, and since Fullbring is a Hollow-based power, he meets the prerequisite of having that Hollow essence within him. After all, Uryu already pointed out that his reiatsu is returning, however faint. I'm not willing to theorize any further since that would just plunge into speculation.