A donkey that often said something like nobody knows, nobody cares..
"Good morning. If it is a good morning, which I doubt."
http://xibo.com/eeyore.php3 has a sample dialog.
The sad sack of the HundredAcreWood, though he appeared to be elated to have received an old pot and a broken balloon for his birthday.
Compare to Marvin the ParanoidAndroid (DouglasAdams).
Created by AaMilne