i do this too a lot. i just feel it's superior. for one, you so often need to use " or ' in your strings, and you're free to this way, your trade is that you can't use unbalanced forms of your quote marker (so, if you use [ as in qq[] you can't write qq[ :[ = sad face ], that's a syntax error), but in the rare case you must use unbalanced brackets in a in a string, it's probably only of one kind, so just qq with another. there's something good about forcing balance too, i'd use balanced double quotes if we had them (on the same level of accessibility)

another argument is if you want to change your double or single quote status for some reason you just have to change the "front" of the string, usually easier to find, and obviously, also half as much to search for.