I have only been asked once in all my 46 years, I wouldn't have cared if he had asked while I was sitting on the toilet with explosive diarrhoea. To me being asked by someone really special is good enough without having to make it something extravagant. You only need a nice meal, a pretty sunset or an open fire as a backdrop, no need for theatrics.
We didn't even get a ring for about six months after and that didn't matter either.