Hi 
Pablo! My family absolutely loves 
Disney Character Dining, so it's difficult to say which is "best" without knowing your cuisine, location, and Character preferences. I would add each Disney Character Dining location offers its own unique flavor and unparalleled experience. For instance, if you are looking to dine with Disney Royalty at either the Magic Kingdom theme park or Epcot, then I would recommend 
Cinderella's Royal Table at the former and 
Princess Storybook Dining at Akershus Royal Banquet Hall at the latter. With the price of you meal at either of those two locations your family will receive an Imaging Package which includes the following prints: four 4"x6" and one 6"x8" in a themed photo holder. If, however, meeting Disney Princesses is not a priority, then I would suggest 
The Crystal Palace in Magic Kingdom and 
The Garden Grill Restaurant in Epcot. For a less crowded experience I find it's best to book Advanced Dining Reservations (ADR) for very early or very late meals. For example, book a breakfast ADR at 
Chef Mickey's as early as 7:00 a.m., or an 
'Ohana's Best Friends Breakfast with Lilo & Stitch as late as 10:45 a.m. Make any ADR by calling (407) WDW-DINE or 
book online. ADR may be reserved 180 days in advance. Please let me know if I can answer any other questions for you. Enjoy a most memorable visit to the Walt Disney World Resort!