My Sandbox Herb Garden is really rewarding. Unlike my hanging herb garden which is for my slightly more delicate herbs, this sandbox type garden is for the hardier herbs like Rosemary and Italian flat-leaf parsley. They seem to be able to stand up to the elements better.
Chives and tarragon I plant in the Spring because they seem to thrive better. They are also a more seasonal herb and usually have to be replanted yearly.
The mint I keep sperate because it grows like crazy and will overtake the whole garden.