understandable, it's simply a matter of taste.
Marvel tried the digest format with some series they were hoping would be attractive to younger readers, since many younger readers are picking up Manga, which is published in the same size. There hasn't been a huge deal of success with the attempt though, with the exception of Runaways, but the success rate is largely a matter of quality, publicity and perception of the material itself, not the format. Unfortunately, Marvel has decided not to rerelease any of the series in full size trades (although Runaways is also published as an Oversized Hardcover), but that's wise thinking as they would be unlikely to be successful in two formats if they aren't overly popular in one
Some people like the digests for their portability, but again, it's just a matter of personal taste and preference