Just knowing how to tie bowline, double bowline and a few hitches will make you a more useful person.
The bowline rules for tying one-handed. Otherwise, I'm inclined to agree with you, but properly dressing the figure-eight can be bit of a chore. It's too easy to get the ropes crossed inside the knot. For non-climbing use, I like the alpine butterfly family. Strong, versatile, and easy to tie in single, double, or triple-loop versions.