Personally, I like the idea of the sticky detonator. I can see some pretty awesome kills coming from it. My one problem is that I heard that it detonates automatically after a few seconds. I hope that 343 makes it so you can leave it for as long as you want, but when you die it disappears or explodes. Many of the awesome kills I can think of for the sticky detonator would require large amounts of patience and a long time active. For example, sticking a ghost in the middle of the map and waiting for someone to get in, or sticking an ordinance drop of a rocket launcher.
Do you think it should have an unlimited timer, only exploding when you pull the trigger or die? If not, why?