3. BROWN RICE - More specifically, brown rice used for sushi and maki
Only in California have I seen brown rice substituted for white rice for Japanese cuisine. Brown rice is healthy and healthier, but it doesn't mean white rice is the devil! Brown rice has such a distinct flavor and has a different texture, so it completely changes the dish. It's also drier than sticky/white rice, and can't stick to to the seaweed nearly as well. If the seaweed is not wrapped on the outside like the image above, it looks messily assembled and falls apart.
It's great that so many restaurants and stores have brown rice and whole wheat alternatives, but those times when only maki made from brown rice is left at Whole Foods...it really bums out my day.