Wow, I can't believe my first post worked out! I thought about three people would see it. Thanks to everyone who made my post so popular! I wanted to try my luck and post another post and see what hapenned. I have two things to say before I proceed though. One is that this is not like my other post. It's a question that was left ambiguous and that I can't settle on an answer for, like many of the blogs on here. The other is that I try not to put any spoilers, but you may find them as spoilers to the Dark Brotherhood, so if you don't want to spoil it, don't read it!
So, my question is what was Amaund Mottiere's secret agenda to having the Emperor killed. Would he obtain power? Did he a personnal or political squabble with him? I can't decide.