If you were to right your own chess tactics book, what would you guys specifically look for?  How would it be laid out?  Would it be a begineers book, or everything from 1 move tactics, to 5 move combinations? 

I would make a series of books, from absolute beginner to 2400+, say eight books.

And most importantly, there would be positions where there is no tactic, where the obvious sac doesn't work because of some defence on the fifth move, et cetera. So people don't just try the obvious tactic and assume it will work.