Reasons I choose to do Minimum Deco (or something approximating it):
* Provided that conditions are pleasant, off-gassing in the water is better than off-gassing on the surface.
* If I overstay my welcome and need to do some actual deco, I already know how to do it, I just need to adjust my schedule.
* A n00b like myself can never have too much practice maintaining level trim at a constant depth without kicking.
* I paid for a full tank of gas, why not use it?
* There's something meditative about hanging stationary and weightless. Why pay a yoga studio for the experience?
* I'm also "trained" for recreational trimix diving, which is much less forgiving of fast ascents and blowing off "safety" stops. Why not use one protocol for all of my dives?
* You can never have too much practice launching an SMB and keeping the line from wrapping around your throat. Especially if your 'home turf' is the swift running St. Lawrence River.
* Anecdotally, reduces sub-clinical DCS instances without the expense and hassle of diving nitrox. Combine with nitrox for ridiculously safe diving.