does more expensive really mean better?

[AmyB]

i drink red wine, and i like Chianti, Beaujoulias, and Cab... problem is, sometimes i get good bottles and others taste yucky (that's a technical term)
I SOMETIMES have good luck with Louis Jadot and DeBeouf, but i think the year mught have something to do with it... These usually run around $10.00--- is my taste more expensive than my wallet?