I'm too lazy to write an essay.... Here are my points:
-Sirius' death was unconvincing and underdescribed, leading me to believe that he will make another appearance in some form
-Tonks was awesome and I think she will (or should) become a more prominant figure i.e. older sister type for Hermione and Ginny
-Harry irritating when unrational but I see that JK wants to convey the whole mood swing deal
-Why haven't we heard about Luna before now???
-DA is incredible, but it's sort of suspicious that everyone can do a patronus, which is supposed to be incredibly advanced
-Thought that Snape would have been more professional about the whole oclumency thing
-Dissapointed in Dumbledore, he could have at least sent Harry a note if he didn't want to look at him... Was a good represenation of the way that you find out the people you look up to aren't actually perfect though
-Umbridge was maddening but a little over the top, so incredibly evil
-Weasly twins overdone, but great except for the riding into the sunset bit....
-Draco is completely onesided, as was Umbridge, they need some explanation and motivation for their actions
-Didn't feel that we learned all that much, not so many new spells... I thought there were a lot more interesting little details in other books
Pretty good book but definately not my favorite, I was expecting so much more.