Avoiding Annoying Titles

So I wrote most of the Zo stories and called it Zo White and the Five Orphants.  Then Toni and I started on Monday Street about three years ago, and since Monday Street follows Zo, I thought maybe they should be place names, so I changed Zo to Paradise Park, which is the park across from the house they take over.   Only now we’ve got three books and the place names are not working, unless we do Monday Street: Catarina, Monday Street: Sophronia, and Monday Street: Keely.  Is that annoying?  If feels kind of annoying.

What’s your pet peeve about titles?  What should a title do?  Feedback, please.   We’re only going to be working on this for the next couple of years so . . . uh, no rush.