lol, I don't mind you being nosey!
it depends what is in the marinade. For instance, any sugar, honey or syrup is out. Satay is marinaded in something sweet so can't have that, char siew pork is on the sweetish side, so that's out too. Once in a while wouldn't be a problem, but if you go to hawker centres often (as I did and do) then it is tricky.
If you make your own marinades at home you can use stuff like soy, worcestershire sauce, tabasco, alcohol, spices and herbs etc. So long as they're not on the sweet or floury side, they should be OK.
At home I eat lots of salad, meat, cheese, green veggies etc (quite Mediterranean I suppose).
You can cook at home no problem, but our family like to go to the hawker centre and it gets a bit depressing eating virtually nothing 