There's a great scene in Casablanca with a linen seller in the Bazaar.
The seller offers increasingly special discounts for special friends of Rick's.
I always think of this scene when writers respond almost instantly to a pass with another query.
"You didn't want that, what about this?"
I'm always at a bit of a loss on what to reply.
I use a form letter, and just sending that same pass seems rude.
I like to avoid that if I can, but just saying "No, not this one either" seems worse.
So then I'm left with not replying at all, which I loathe as a business practice, and as general deportment in the Query Aisle.
So, why is this a problem for you?
If you want me to consider your work, you want to present it in a way that doesn't make me want to smack you upside the head.
That means give me some time between queries to refresh my mental desk top.
A month is a good ball park figure.
I don't reply to queries the day I receive them.
I got that habit kicked out of me by writers who were dead certain I didn't read the query cause I responded too quickly.
When a query comes into my inbox, it's sent to a file marked Incoming Queries, where it can visit with the other incoming queries, gossip, compare tattoos, and order out for pizza.
If you send me a query that starts with "you didn't want X" all that does is remind me that I didn’t want X.
It's much more effective to start with the story you're pitching.
Telling me I passed on something doesn't remind me of our "connection" cause there isn't one.
Telling me I passed on something doesn't tell me you're prolific and not a one-trick pony.
Effective queries are about your novel not your querying history.