According to the political scientist Michael Barkun, conspiracy theories rely on the view that the universe is governed by design, and embody three principles: nothing happens by accident, nothing is as it seems, and everything is connected. Another common feature is that conspiracy theories evolve to incorporate whatever evidence exists against them, so that they become, as Barkun writes, a closed system that is unfalsifiable, and therefore "a matter of faith rather than proof".
I have deduced that my personal affection for conspiracies stems from a three-fold cause. Firstly, the obvious literary utility that I mentioned above. Secondly, the acceptance and awareness of conspiracies unite us as humans, by the fact that we accept that there are many organizations that we can be innately excluded from, based on such identity issues as race, religion, social and political peer groups. Thirdly, that it is an historical consistency that there have been, and always will be, ploys engaged by someone somewhere, whose actions and ultimate goals elude us completely.
So, let's take a look at some of my favorite "tin foil hattery", and gauge the likelihood of them passing actual conspiracy muster.