I eat most everything but I do notice that some things set me off - frequent bowel movements, feeling frequent need to go but have to strain to get anything out, irritated lower bowel. It seems to be a lot of rich food, food with a lot of cream - a lot of recipes these days call for adding cream to the gravy, I notice - and some spicy food, but not all. When I get this reaction it feels very debilitating. But it does pass when I calm my eating down. Unlike what some might expect, I find legumes (red beans, black beans, etc.) and rice, including brown rice, to be very good for my gastrointestinal tract. Also, I eat nonfat yogurt with oat flakes, raisins, bananas and nuts for breakfast most days and that seems to be good.
My biggest issue is sleep interruption. I wake up several times a night and I'm not sure if it's the bowels waking me up or waking up triggers the feeling of needing to go. It's exhausting.
Overall though, I guess I'm doing ok. Would be interested to hear from others.