Have you ever tried using meat marinades for your tofu and vegetables? (things like mushrooms and the like)
When I make meat, I usually stick to Korean/Chinese/Japanese style marinades because I'm more fond of those flavors. Why not try a bulgogi marinade (ginger,garlic, pear, chili paste optional, sugar, soy sauce, sesame oil, salt/pepper, chopped green onion also optional) or a teriyaki (orange zest, soy sauce, brown sugar, etc..) or like a Beijing style soy sauce? You can stir fry vegetables and tofu and then add the sauce to serve with rice... or you can marinade them all and grill them!