I am coming back to Boston for a visit from a place where none of the above are available and would love some recommendations in those categories. Preferably not too expensive, and would love to try out new places. I have been to a number of places in the Porter Exchange for Japanese, and had barbecue at the East Coast Grill and the now-closed Jake and Earl's and the old Porterhouse Cafe before it went downhill. I have never found decent cajun/creole or Mexican food in the Boston area.
By the way, as I am coming from Uganda, and Boston is the center of the Ugandan community in the U.S., are there any Ugandan restaurants in the Boston area (I think many Ugandans in the Boston area live in Waltham)?