Hi Osto,
I don't know if there's any “best” ostomy to have, as each type has its issues, but as a general rule of thumb, the less you interfere with mother nature, the better off your life will be. In that vein, the more bowel you have, the better off you are. I think it's really that simple. Besides the type of ostomy you have, intestinal valving that you lost or still have makes a whole lot of difference. Understanding how our digestive system works takes all the mystery out of why ostomates of all types experience what they do. And it can also let you ‘game the system' a bit to get more quality of life from this whole mess.
The liquid you're referring to in your full bag when you get home is mostly bile. Your digestive system works continuously, whether you eat or not. And since your bile can no longer be recycled (if that part of your small bowel is missing), then the only place it can go is in your bag. You make between a liter and a liter and a half of bile every day, even more if you eat a lot of fats. Add that to whatever you eat or drink, and output is inevitable.
Without your colon, you can't absorb water the way normal folks can either. Guess where that ends up? Once you understand the digestive process, all this is normal and to be expected. Does your stoma slow down? Not really. For the first couple of months, your body has to readjust to the new you, and bowel adaptation takes place slowly but indefinitely. What determines the “speed” of your ostomy is primarily what you eat and what you drink, and how much and how often. As others have posted, there are some foods that help some people slow digestion, but be forewarned that any advice you're given here is what works for someone else. Everyone is different, and you'll need to experiment and find out what works (and doesn't) for you.
You're going to have a tough time stopping your output for a few hours, for the reasons I stated above: your bile flows continuously and you have no way to recycle it, the small bowel doesn't absorb water well, and you can't stop motility, just slow it down a bit. Once you figure out how your body absorbs fats, carbs, etc., you can tailor your diet to minimize output. But stop it? Probably not.
;O)