sirsloop said it best. If I'm making a beer that does not rely on yeast flavors or I don't have time for the starter then I don't at all mind using dry yeast like US-05 or Notty. However, if it's a belgian, wit, british style...I'll use liquid every time. There are certain characteristics that specific styles draw from the yeast and in those cases the liquid is best in my opinion.
Secondly...those that are saying cost is a factor...just start washing your yeast and you can get many uses out of that one vial. I even swap washed yeast with my buddies, I've payed for 1 vial in my whole 1 year of brewing. I have 2 each stocked of some pacman, wit, and english ale yeast.