Is it normal to switch back to one's own old diet?

I'm back to my old diet, which is simple, whatever works, with strict guidelines, and kept it simple, as simple as I can: minimal fats/oils, sucrose, salt, more vegetables, dark leafy greens (broccoli counts), lotsa mushrooms and nuts, more pseudograins like millet and quinoa & buckwheat, whilst retaining two of my favourite diets: vegan liquitarian (the complex diet it is), and pseudograins, nuts and mushrooms, caffeine, coffee, tea (I mean camellia sinensis), caffeine, dairy, tobacco, snuff, smoking, cola, & alcohol in moderation. As for my old diet, since I like real cheese, not soy, and hate meats other than fish and seafood (they feel heavy to me), avoiding cephalopods and decapods & sharks, echinoderms, cetaceans and intelligent animals and primates, other avoidances are implied, lacto-pescetarian suits me, and I think I can have regular soy milk again (if put in my coffee and tea), I hate eggs other than caviare. That means I can have fettuccine ai frutti di mare (it's a bit like spaghetti marinara but contains fish I like, like large shrimps, bay scallops, clams, anchovies packed in oil, and mussels), it's my favourite pasta dish, and I'm not limiting the type of fish but would be careful with foods that are black (may contain squid ink). Lacto-pescetarian did actually work but I was eating the wrong foods which gave me gastric reflux, like saturated-fat potato chips, however given I can enjoy any fine dark chocolate it's no longer a problem, however I'm also having Chokito (heard of it?) and avoiding corn/maize and any rice other than brown rice, would thus this be normal, or is it anything beyond that?