To me a chapter title is really useful in giving each chapter a distinctive vibe and makes them more memorable. I personally like giving poetic and symbolic titles, or ones that have a sleeping reason to them. Plus you can stuff secret messages that can make readers go 'oh, that's cool,' in them too.
I don't know if I specifically care much whether the fictions I read have chapter titles or not, though. I think it's more so something I notice and think, "Neat!" and move on. But it's not as though I see "Chapter 1" and "Chapter 2" and so on and think, "Ugh, boring!" and leave, either. So in a way I don't think they're as powerful as the blurb and first chapter's content are.
Although, now I'm wondering if maybe they DO play a role due to how the page layout shows the table of contents? Even subconsciously?
Kimbel, by contrast, the character I find to be one of the most interesting (but least likeable) characters, is the least popular by average.
I don't think my story is popular enough yet to warrant reader preferences on characters, though. I think most of this is probably just my luck of uploading time.
Now book title on the other hand that's another story because it's the first thing they see other than maybe the cover. By the time people are reading your chapter titles they are already in the story and honestly i haven't hear anyone talk about not reading a story due to chapter titles.