I'd be happy with readers who actually read the book. From beginning to end. No skimming, no skipping. To simply read the thing. Sounds simple, I know.
On the Internet, in the Web novel era, vanishingly rare. Even among the readers who enthusiastically engage in robust comment exchanges, few of them read it. From beginning to end.
I've been on at least seven sites like this one, with e-novels. Everywhere it's the same. Far more skimmers and skippers than readers. Everywhere I've ever been. (I've been tilting at windmills for about three years, and over that span it's become much worse.) On Wattpad, I had about 30,000 "readers." Not viewers. Readers. How many truly read the books? Maybe 120. AO3 was maybe the best. I had about 80,000 "readers" there, and probably about 1,500 actually read the books from end to end. (I left AO3 when I realized I was competing for the most part against illicit p@rn.) Dumping AO3 was a shame. I had nearly as many readers as RR and this site have registered members. But even there, most of them skipped around. Loved the books, left great reviews, skipped to the end, loved it.... but didn't read it.
It's a shame. A real shame.