So 9/10 people come to you, most of the time you quote them $3000/$3500 irrespective of their budget and they walk away?
If you don't want to call them "packages", that's fine -- but if you're giving fixed-price quotes of $3000-$3500 irrespective of the client when all they really want/need is 10-20 hours of your time you might be doing yourself a disservice.
By the same token, if your experience tells you that you really need the 75 hours to do a good job for a client, then don't sell yourself short.
Maybe you need to ask your clients to clarify what their expectations are in terms of hours and incorporate that into your quotes?
Maybe you need to clarify that you can be flexible with the overall price in exchange for less time (e.g. maybe do fewer revisions, simpler designs, whatever -- I'm not really a design expert).
Or maybe it's time to start billing by the hour? :)
Of course, you may hold yourself to a high standard and feel that you require that much time to do a "good job" by your clients. That's fine too, but understand that's a business decision that will leave you with fewer clients.
Just my two cents, but hope it provides some food for thought.