It seems that every restaurant I eat at, the tartar sauce tastes different. I think that is because there is such a wide variety of recipes and ingredients, that how it is made probably depends on the taste of the chef making it. It can be sour, or sweet, tangy or even hot and spicy.
I feel that tartar sauce should be made to go with what you are serving it with. If you are serving it with spiced battered and fried fish, then spicy tartar sauce would be perfect. However, if you are serving a delicate broiled fish, the sweet may be a better choice and if you are grilling outside, then the tart dill would compliment that type deliciously.
Below are my favorite recipes for the different types of tartar sauce. If you would like to make your own sweet pickle relish, check out this post from 2014: How to Make Fresh Sweet Pickle Relish
Spicy Tartar Sauce
I make tartar sauce when I plan to serve fish, but that is not the only thing that tartar sauce is good on. A local restaurant here has a delicious grilled ham and Swiss sandwich that is served with tartar sauce on it. Many people also dip their French Fries in it, instead of ketchup. It can also be thinned and made into a yummy salad dressing.
This tartar sauce is fresh and delicious, but it will not last long in the refrigerator, 3 to 4 days at best, so you should not make more than you can use in one meal. I have never really found that to be a deterrent from making it, since it is so easy. A batch can be whipped up in ten minutes or less!
Have a great week!