I'm just going to address 3, because it's the one I have thoughts on. I too hate PowerPoints, and I think much of the PowerPoint craze is based on a condescending attitude that "young people are different now and they need visual stimulation," which is often just a thinly veiled claim that young people now are stupid, have no attention span, and couldn't follow a thoughtfully structured traditional lecture.
Unfortunately, the result is rarely thoughtfully structured, and it rarely draws the student's mind through the material as effectively, removing such opportunities as seeing where a professor is going before he gets there that are actually engaging. I really think 90% of it is just laziness and a desire not to prepare actual lectures, dressed up as concern for students. Of course, it's possible that there are great ways to use PowerPoint and I just haven't seen them; but in that case, I'd say wait until you actually think of something you want to achieve that PowerPoint naturally suggests itself for. Don't just use it because it's popular, in, or expected.