I have never used garlic from a jar, so I can't make a comparison. I just love garlic- usually double the amount called for in a recipe- and I can't imagine not using fresh. I like chunks of it in my salads, sauces, vegetable dishes. The smell of roasting garlic emanating from the oven is heavenly; sauteing fresh garlic and onions on the stove, a dream. I'm actually weird enough to like the lingering smell of garlic on my fingers.
Go for the fresh stuff, girl! You won't go back to the jar!
If you are a dreamer, come in. If you are a dreamer, a wisher, a liar, a hoper, a prayer, a magic-bean-buyer. If you're a pretender, come sit by my fire, for we have some flax-golden tales to spin. Come in! Come in! Shel Silverstein, Where the Sidewalk Ends.