"Hudson, Taylor, Dean" -That one was a lightpole cache hint.
"If you need a hint on this one, you weren't there. " -Granted, this one was a virtual, but we still spent 20 minutes finding the darn thing.
"thgil" - I have no idea about this one, and that's after I decrypted it.
"Where the money goes?" -Keyholder on the back of a sign, don't get this hint
These are just a few of the ones I've seen, will post more later.