I will take a crack at some of these:
1. Yes - some do frequently, particularly if they overeat. Personally, I haven't in the past six years since surgery.
2. Yes. Ingested air or gas from digestion has to get out someway - there are two routes.
3. Post op tolerances vary widely with some not able to eat some foods for varying lengths of time, and some have no issues at all with anything.
4. Depends on your surgeon's program. Mine was soft foods and liquids from the get-go.
5. Depends on surgeon's program and individual needs and inclinations. Most are protein centric as our bodies need certain minimal amounts and can get by with little else. Some follow one of the many popular fad diets while others concentrate on learning to eat sustainably for long term maintenance and weight control.
6. No idea, but it shouldn't hurt.
7. No experience.
8. No, more like T-giving dinner after seconds, thirds and fourths, only with a small fraction of the amount. Some may experience what they call foamies or slimies when things come back up but I have never experienced this.
9: Water goes right thru; capacity of the stomach is irrelevant. Eatiing/drinking limitations are variable but usually settle out at no drinking for 30 min after a meal. Before a meal doesn't matter as the fluid flows right thru the empty stomach, though a limitation of 15-30 minutes is often used initially to account for post surgical stomach inflammation that may impede fluid flow.
10. As before, with a sip of water. For a while it was one pill at a time with a sip rather than a handful of pills with a gulp, but that settles out over time. Some RNY oriented practices like to use chewies or gummies to avoid pills getting stuck in the stoma, which is irrelevant for sleeve patients who don't have a stoma. Some large pills may work better split or crushed for a time.
11. See Above - fluids flow right thru the empty stomach. Drinking immediately after eating may result in things coming back up.
12. With the sleeve, nutrition is largely up to the patient as there is no significant malabsorption effect. Early on, much of our nutrition other than protein comes from supplements but that decreases as our diets improve over time.
13. For a time, yes, and some do more than one. Some choose to continue using them for the long term out of convenience.
14. you aren't going to do much to damage your stomach by exercising too much/early, but you can induce incisional hernias.
15. Choose better parents and don't get fat in the first place. Seriously, it's a matter of genetics, age, and how much fat is stored where.