I know DH all but almost happened. It's just not worth it to use it at all in my activities. Though I did read a "canon complient" Drarry that was pretty good. I am so happy you leave Sirius and Regulus alive! I got in a heated argument with my friend a few weeks ago about wether or not Sirius loved Regulus. They say no of course I do not agree with that at all.
I had a problem with the DE run Hogwarts too! WTF who would send their kid there? But fear leads lots of people to do lots of stupid things. Like Fudge I think he was a way worse minister then Scrimgauer because to be inaction is far worse than anything.
My personal canon Snape is alive most of the time. I get so into it sometimes in my head I actually forget he died in DH. It's like I remember the Snily stuff but forget everything else. Everyone I know who does RPG does love it very much.