I don't know what it is about them. I certainly don't need the tokens to buy recipes, and my character hardly needs the pittance of gold that completion rewards her. But every day, I still head out on my trusty steed, picking Prickly Pears, grabbing Muddy Crawfish, and murdering thieves. It's just part of my routine, and I feel weirdly incomplete if the server resets before I can get them done.
What about you? Do you run your cooking dailies every day? Do you still make your way to Baradin Hold or Firelands to grind out a reward? Do your characters head to Dalaran or maybe even Shattrath to do their good deed of the day? Let us know.