Stacey,
No, it is not crazy at all to have the
Deluxe Dining Plan! I have not been able to use it affordably during family vacations to Walt Disney World, but only because I have two kids under 3 who just can't sit still for three table service meals a day.
However, when I travel with just adults/tweens/teens, it is a great plan. We enjoy table service meals for more than just the great food. We enjoy a slower breakfast where we can discuss our plans for the day, lunches to get out of the heat and slow down, and long dinners where we can share our favorite experiences from the day activities.
Also remember that if you are doing any dinner shows or Signature Dining experiences you will go through those dining credits faster than you think. We visit
California Grill and
Jiko on pretty much every trip, so there goes four meals, in just two dinners. As such the 3-per-day table service credits really help out!
So simply compare the cost to what you think you will spend otherwise, and if it makes sense, I say go for it!
Have a magical (and delicious) vacation!