User blog comment:Godisme/Deicide 20/@comment-44061-20100902030858/@comment-44061-20100902160813

I would bring the point to you that regardless of the method use to achieve his bankai whether the normal way or through a short cut. Its still his power and still his bankai that hasn't changed any. The shortcut was to attain it, its not anything else. He would still have to train to use it. What we can speculate at is that the fast method may get you bankai but not correctly or completely. Bankai like shikai is something you must train at using and over time you gain more skill and possibly more abilities.

So au natural sure. Incomplete previously, yes possible. Complete now looking that way. Someone else brought this point up but ill bring it up now Aizen mentions that their evolutions are different. He is right if you look at the history. Ichigo has been trying to reign in his power for a little while now. Zanpakuto spirit, inner hollow, zanpakuto name, bankai, hollow mask. all are natural to him as power. Aizen has been using an artificial construct of science to increase his power. So yes good v evil, light v dark, natural v artificial. Whatever you call wanna call the scenario still is the same.