depends what I'm cooking- I'm really into thyme at the mo, particularly lemon time. I like woody herbs this time of year as they remind me of hearty stews! I've always got mixed herbs and oregano in my cupboard. I try to avoid ready mixed ones like italian seasoning as they often have salt and extras in! For your dressing pick a herb that you like and go for it! Don't have too many fresh ones as I reckon they have a fair bit of carb in them, like veg and avoid chives as they are part of the onion family. It totally depends on what you have in your salad I guess!
I'm doing the 810 plan at the mo so I've been cooking my chicken with a bit of stock and lemon thyme...mmmmmm. You could also do it in a foil bag in the oven and add some spices!