Imagine that a neighbor learns that you know a lot about knots, and he says, “The other day I grabbed a length of rope in my garage in order to tie up something in my back yard, but I didn’t really know what knot to tie. Can you show me the best knot that I should learn?”
Now, we know that there is not one knot which is “the” best knot, because there are a number of variables which will determine the knot that is best for a particular application. However, your neighbor says that he has neither the time nor the interest to learn dozens of knots and their strengths/weaknesses (I know, I know, it’s difficult to imagine someone not having any interest in knots! ;D).
You give his request some thought, and you show him one or two knots in several categories (bends, hitches, mid-line loops, end-of-line loops, etc.) which you consider to be the “best of breed” in those categories, taking into account the ease of tying/untying the knots, the strength and security of the knots, and so on. Granted there are a number of important issues such as the type of rope, the type of conditions in which the rope will be used, etc., but you recognize that your neighbor is only looking for some useful, general-purpose, around-the-house-and-yard information about knots. In other words, he is an “average person” who uses knots infrequently, rather than a climber, sailor, fisherman, arborist, weaver, etc., who has specialized needs for knots.
With this scenario in mind, what are the few knots that you would teach your neighbor, and why?