Something that annoys me when it comes to hints:
A person with very few finds looks for a cache which is more challenging (according to the rating system) and logs that they looked for awhile and couldn't find it so they called a friend who pretty much gave them a really good hint or told them right where it was . . . I have no problem with offering a hint, but kind of wish folks would try a little harder.
On the flip side, I try to send hints to folks who have logged a DNF (as Eikidokai says caches are meant to be found) or whenever I get an e-mail requesting an additional hint. Unfortunately, I don't always get e-mails from gc.com letting me know about the DNFs for whatever reason.
Something that annoys me about my own cache hints:
Some of my cache hints are pretty obscure and some really are not at all useful if you're in middle of the woods without a connection to the internet . . . sometimes I think I should change these hints, but then I think to myself that it may not be as fun to have the hint say, "Rock and Roll" or "Don't get stumped."
Something that annoys me about caches without hints:
The easy caches . . . no problem. The challenging caches . . . I hate it when there is no hint or it says something like "in the rocks" and it's hidden in a boulder field or "check the tree" and you're in middle of the forest . . . and don't get me started on the cache hints which say "Take Exit 32 and . . ." D'uh . . . I have a GPSr . . . I don't need directions to the general location.
Things I hate when folks log a cache (and yeah, I know this has nothing to do with hints . . . it's just an annoyance):
I hate it when I've taken the time and spent the money to buy an ammo can, find a good scenic spot to make the hide, filled it with swag and then folks come through and log the "X number of finds out of Y number of finds for the day. TFTC" . . . this annoys the hell out of me . . . I know I shouldn't take it personally, but I feel like my cache was just another number and the person didn't take the time to look around and appreciate where I've taken them.
OK, I'll take my happy meds now . . .