I like some of these a lot!
Some of the first ones about the scroll wheel and the moving multiple items would help tremendously. I find myself sometimes trying to move 20 objects through a list of 200...
Also, the ones with duplication and merging. Sometimes I then need to move the merged/duplicated object, through 200 like above to get back to the animation group where it came out of.
Even a few of these (like the scroll wheel and merging ones) would be amazingly helpful