I would prefer that my ashes be disposed of, not kept in a urn or some crap like that. I've often kidded that I wouldn't mind if they were thrown into the cat's litter box.
I've been to a number of cemeteries over the years and one thing I've noticed is the silence. One, in particular, had tons of trees, but I was unable to hear a single bird. Wonder if they know enough to stay away. Burial might be fine for some people, but I can't say I like the way it's presently done. I think caskets should be made in such a way that over time they decompose (just like the body inside). In that way, the remains are actually incorporated back into the earth as opposed to being encumbered by a box needlessly protecting it from the elements.
Many prefer to be buried for religious reasons. Quite a number of faiths teach that since the body will one day be resurrected, you should keep it in as good a condition as possible, especially after death. Problem is, if you look at a body just a few months postmortem, you'll see there's not much left to resurrect.
This Halloween, as you dance and drink at your favorite cemetery (I'll be roasting marshmallows at Fawcett's Crematorium), ponder for a moment if that is where you truly wish to spend your un-bodied days.