I'd also like to see people who log finds have the ability to rate the cache. A simple 0-10 score would do. Let finders decide themselves what criteria to use.
Cache hiders can use the feedback to decide if their cache needs looking into. For example, a gradual dropoff in ratings might indicate "trinket depletion" (copyright 2001 by Scout ;-) and time for the cache hider to replenish it. On the other hand, a bunch of 10s might clue other geocachers in to a fabulous cache that they should add to the list of caches to hunt.
(Edited by Scout at 1:32 pm on Aug. 3, 2001)