I've just moved from Detroit after a 3 year stay. These are my suggestions: Chicago-style pizza - in Greektown at Pizza Papalis Mexican - Mmexican village, near the bridge to Canada, off I-75S. My favorite is called Xochimilco. Thai - Fast food thai - Bangkok Express on 9 mile and Woodward
Sit-down - Thai Inn on Rochester and ?Avon
Chineese - you must cross the border into Windsor, htere are tons of places Indian - don't even look in Detroit; Windsor's the place and the name is Himalaya.
I hope you enjoy your trip. Detroit/Windsor can be a lot of fun, actually.
--ChandraDetroit, MI