Originally Posted by Karn Maeshalanadae
And whether that secondary personality is the real author, or your objective reader, the opposite will be your judge.
Don't know as I approve of people going round being their own judges, not when I've got the monopoly on all Judicial Actions around here...
I agree with Teresa, and if this is your first book, you yourself simply won't know even when you've finished. As new authors we're all too close to the writing, and we just can't get the necessary objectivity here at the beginning of our careers, so we carom wildly between thinking it's the best thing since Shakespeare and a pile of utter garbage. We need a good critiquing friend, someone who can read it objectively, and show us its faults (because it will certainly have faults) and its virtues (because it will surely have some... we hope...).
And there are two aspects to it, too. You ask when do you know that the world you're building is one worth reading about?
But even if the world is awesome in its conception, if the delivery is bad, because the prose is plodding, the dialogue insincere, the characters ludicrous, no one will read far enough to find out.
But as you say, for now don't worry about critical reception, just write and enjoy the writing. When the book is written look it over again and then start thinking about getting that critiquing friend.