Vinylex for all around dressing. I use this on most of the cars I detail. It performs well, and makes the tires have a medium glass. Lasts about a week and a half with no rain, 5 days with a shower or two. I apply with a eagle one tire swipe, or a terry applicator (SUV's). Then buff out with a terry cloth.
Meguiars Regular for the Turanza's on the BMW's I detail. It does not sling when buffed, and I buff it down twice. Lasts about 3-4 weeks on a garaged weekend warrior.
Meguiars Hi-Gloss or Armour All Extreme tire shine when I feel like it on certain cars (corollas, neons, hondas.)
Sorry for not offering a favorite, but I like different dressings for different cars.
Jason