Most knots can be tied in more than one way. Therefore one method is no more right than the other as long as the end results are the same. Most symmetrical knots have merit. Use the one that is easiest for you to tie.
Many knots are relatives to each other.
For example the bowline is a loop version of the sheet bend. Considering that, we can derive many loops from bends and vice versa. Extra half hitches or turns help in many cases. Add others as need arises. A knot is most useful when it can be tied easily and without much effort.