And also note that the DxDP appetizer only matters if you're doing "menu service" -- it has no effect at any breakfast, buffet, family style meal, dinner show, or other fixed priced location.
Personally, I'd rather skip dessert than the appetizer, if I were choosing one or the other, most of the time (that is, unless there's a specific dessert I want to have), because while they're both "extra calories", at least the appetizer will be more likely to have reasonable nutritional value.