Aizen Shimura - I think Yosh put it well. Simply too much mastery in too many natures and expanding the ability from only destruction like in the canon version to creation as well [i][b]killed[/b][/i] it. There's simply not enough depth to back up how he has such intricate and powerful abilities, he just seems like a bunch of powerful elements spliced together. 

Toshiro Gomakashi - He was just now elected to Tsuchikage at 50? Care to make some backstory on the last Tsuchikage and what happened, it would do well considering Iwa will be [i]your village[/i]. 
Pertaining to [i]Meisagakure no Jutsu[/i], how proficient are we talking? Also I hope you don't plan on using Shunshin in an actual fight. 

Minemoto Uchiha - Heh, I like him. Hop to it with that history! You might have to cut down a few of those Blaze Release techniques but we'll see what the finished product looks like.

Matsuo Bushou is accepted.