I think the best cache hidings I've found are the ones where the cache is completely out in the open, yet invisible to the cacher. In searching you'll cover an area time and time again, and come up empty, then suddenly at the moment of giving up you look at things from a different perspective and slap yourself for not seeing it in the first place. Of course, I'm glad not all caches are like this, or I'd have a lot less bagged! This does throw the pressure on the hider to come up with something creative, and is not always possible in all environments. I plan on hiding one down my way very soon, and am hoping I can find a suitable spot for something clever.