I see people make statements about "complete draining" alot, so let's break a little news here.
First of all, most vehicles do not have the drain plug in a position to completely drain the oil pan. I have removed plenty, after allowing the pan to drain for an hour or more while I was doing something else, to find that there were still several ounces left over in the pan. The necessity for reinforcement around the thread area means that most pan's drain holes are slightly above the floor of the oil pan.
If your engine has an oil cooler, you have no chance at getting a complete drain, either.
I have EZ valves on my vehicles, and love them to death.
There's nothing I dislike about changing oil more than that point where the drain plug is about to release, and the oil just starts gushing out onto my (gloved) hand. With my valves, I just connect a hose down into my 58 quart oil pan, and let it go. There's nothing to clean up. Makes gathering UOA oil a lot easier as well.
I drain 3 gallons out of my Ram, and it doesn't take very long at all. I don't have to monitor it, so it doesn't bother me at all.