For me, it varies a lot from story to story how long my chapters are and how I choose to break them up. In the last few novels I've written, I've written from the perspectives of several different characters, alternating each chapter, which can be challenging as far as chapter length is concerned because I usually can't just cut the action off and finish it in the next chapter like I could if every chapter was about the same characters, written in the same perspective. Not that I would necessarily want to. I usually like every chapter to be about one "thing," whether it's in one long scene or several shorter scenes that go together. Because of that, I focus more on content than word count. I won't end a chapter in the middle of the action just because it's hit a certain length, unless it makes sense to leave a cliffhanger. So even though I do like my chapters to be similar in length across a whole story, I tend to have a wide range for what is acceptable. I'd say my average word count tends to be 2000-4000 words per chapter for most stories, but there are some stories where the chapters run on the shorter side and some where they're longer.
As a reader, I couldn't care less about word count. It's not something I usually look at, and the only time I notice it is for super short chapters (under 1000 words). Like Mare said, if a chapter is under 1000 words (other than a prologue or epilogue type chapter), it's usually lacking in something... like detail! Chapters that are mainly dialogue tend to be shorter than ones that have a lot of description in between the dialogue, and while I'm not into over-the-top descriptive passages like Mare's spaghetti hair example LOL, I do like some description in there. I don't want to feel like I'm reading a script (and even good scripts have more description than some stories I've seen... just saying! LOL). Long chapters don't scare me. The only time I would even notice that they're long is if I get bored reading them, and in that case, I wonder why I'm bothering to read that story anyway. As long as the writing is entertaining, I'll read chapters/stories of any length.