I'm 17 months out, and I feel way better than normal. I had clearly forgotten what it felt like to be a healthy weight, and I definitely didn't appreciate it back in my 20's. I seriously feel joyful so much of the time.
I can feel mildly nauseous, if I eat too much too fast, but it passes quickly. I have had a few quite mild dumping-esque incidents, unusual for a sleever, but nearly all liquid sugar related (no more vietnamese coffee for me ) I have vomited twice since surgery, both times from vitamins on an empty stomach. I've always been sensitive to pills, same thing would have happened pre WLS. I have an iron sleeve, almost nothing bothers it.