Mustard sauces - too much mustard, consider adding more cream or something.
Recommended topping: sausage (krakowska), onion, pickled cucumber.

Tomato sauces - the second one (with mexican sauce) is better.
Recommended topping: salami, onion, mushrooms, pepper.

Cream sauce - be careful with the danish sauce.
Recommended topping: tuna, olives, spinach & garlic slices.

More photos on flickr.

Mustard sauce 1: - mustard: 3 tbsp - mayonnaise: 1.5 tbsp - ketchup: 1.5 tbsp - sour cream: 1.5 tbsp Mustard sauce 2: - mustard: 3 tbsp - mayonnaise: 1.5 tbsp - sour cream: 3 tbsp Tomato sauce 1: - tomato purée: 3 tbsp - mayonnaise: 1 tbsp - sour cream: 1 tbsp - ketchup: 1 tbsp - hungarian sauce: 2 tbsp Tomato sauce 2: - tomato purée: 3 tbsp - mexican sauce: 6 tbsp - barbecue sauce: 1.5 tbsp Cream sauce: - sour cream: 6 tbsp - sweet cream: 3 tbsp - danish sauce (mayonnaise based with vegs & curry): 1 tbsp

Mix it.