Although I still do an eyeball check on a few coins (no magnifier) for errors, I haven't searched cents for errors in a few years.
When I did, I remember finding:
* 1998 Wide AM (probably about a dozen)
* 2000 Wide AM (probably about a dozen)
* 1984 Doubled Ear
* 1992-D Close AM
I think there were a couple of others as well, but I don't remember the details.
I also found a few blank planchets and clips, and I still pick those out when I see them...which happens occasionally.
I stopped because I found error searching to be very time consuming as it requires date checking all my cents as well as extra time to look at potential errors with a magnifier. I can't remember if error checking either doubled the search time or quadrupled it, but either way with the volume I was doing... I just didn't have the time and the part I enjoyed was finding the wheaties, so I focused on that.
I may start error checking again if my time frees up, but I don't see it happening in the near future.