prosfilaes
Adventurer
I certainly prefer universal guidelines on setting DCs ("15 is moderate") to a list for every situation.
As a player, I'm most comfortable when I know about how difficult stuff is. I want a 15 foot long jump to be a DC 15 check, not whatever the DM feels like at the time. Consistency in play doesn't negate the fact that I already put x number of points into Jump in creating the character, but it does let me judge future jumps. However, the DMs I've played under (and I'm far from arguing this is universal) haven't seemed consistent in rulings; "moderate" could vary from day to day.