Ahhh good 'ole AR tests, never took any but administered many. It started to become a huge deal at the school I student taught at while I was student teaching. :-D
I don't think I'd be able to make them for mine either, I have a hard time remembering LAST names of characters that I use in the beginning and then don't need again until later. LOL! Plus sometimes my brain doesn't make my story logical. *points to Messing with Magic and the soon to be finished Widow's Walk* I think it's because I write them too fast sometimes.
*sigh*