BIB
No, it's not my opinion. In court, under oath, OP explained why the photos of the positions of the fans and duvet didn't fit his version, because they don't fit his version. And those photos are evidence. The evidence does not support OP's version. OP ultimately didn't even support his own version as he changed it to involuntary and not self defense. Therefore, it is more possible that his original version is not at all what happened that evening, which means he likely is guilty of premeditated murder.
The Rest
I've said all along that my opinion on OP's guilt (of premeditated murder) was solidified after watching his testimony. I simply do not believe that the the police moved every item that doesn't fit his versions. And I am not at all convinced anyone turned a fan on due to the smell of human blood.