I might be thinking on the wrong track, but it seems that automatically regaining concentration hourly might get in the way of some interesting story telling. For example, if I want to RP my character as always going for days on end with little chance to rest due to being hunted, he should really not be gaining concentration at the full rate. I would want my character to be limited in what he can cast until he finally gets some real rest. If He then sleeps for 13 hours upon reaching safety, should he not gain some kind quicker concentration gain.
As it is I will simply be gaining the same concentration back regardless of weather I RP my character as getting rest or not... Just a random thought is all...
