Write what you want to write in however many words it takes. Especially if you are NOT being paid for said work.
Once you start to pander to what your audience wants, you stop being an artist, and become a hack. Which is perfectly okay when you are being paid for the work. But not when it's a product of your own passion.
Every reader will approach your work uniquely, and you cannot please all of them as reader A will want a hundred thousand words, and reader B will want Eight Thousand. Reader C wants to read a whole story while on the train to work, Reader D wants to enjoy a work over a week and a half before they go to bed at night. Reader E will just jump to the smutty parts skipping everything and go wank after one fast look.
You can't please them all. And if not being paid then you should be pleasing yourself.
Myriads