yes - buyer's remorse is common the first month or so. Many of us have been there.
also - yep - many women mention their hormones being out of whack the first few weeks or months. In addition to weird moods, many often experience weird menstrual cycles. All that eventually stabilizes
taste & appeal of food - many of us lose that for awhile. It's common to lose your sense of hunger for up to a year after surgery (a small minority never get it back it all - honestly, I wish I would have been one of them - it would be so much easier to lose & maintain my loss!). It's very weird at first, but you get used to it. My hunger came back at five months out, and things got much harder then. It is SO easy to lose weight when you're never hungry and couldn't give a flip about food. Take FULL advantage of that!! It'll never in your life be easier to lose weight than it is right now when you're not hungry and don't care about food!! Just make sure you're eating and drinking enough to maintain your health. So I know this sounds weird, so enjoy that "feature" while it lasts and milk it for all it's worth - because it your hunger and "food appeal" will almost certainly return at some point this year.
drinking - you'll be able to drink a lot more as time goes on. I can drink normally again. But for now, just do whatever it takes to get the required amount of fluids in, even if that means sipping all day. Dehydration can land a lot of people back in the hospital...so keep at it!