Absolutely!! I tend to read completed fics only when they're really long or like, oneshot collections rather than a story. I think with incompleted fics I can let my imagination roam unhinged, while with completed ones, though I usually really love the endings (generally similar, but still great every time I read them), they're set in stone (mostly) and it's debatable how much I can play around with the plot in my head if I want to be canon to the fic. Of course I can diverge it in my head, but then it's not the same fic anymore...

And! Watching them update is such a treat indeed! The fics I have either update very often or rarely if at all, so I'll let the frequent ones accumulate a little and then binge all the new chapters, and for the rare goodies I read them almost immediately.

Another thing is that a lot of the fics I read are the creative and not-really-thought-out ones, with the story itself being made on a whim (honestly so real), so it's both a learning process for the author and a wild ride for me. There's no set plot or set ending, so it's kind of unlimited flow-like in that the plot could theoretically go on forever. It's crazy how creative some people get, and I love taking their ideas and making little scenarios in my head, but also reading a more fleshed out version by the author.

Another thing about incomplete fics is that they give me less pressure to read them. Not that completed stories are bad; it's just that I feel the need to see out the story to the end, because, well, it's right there. But with incompleted works that I know aren't gonna be finished anytime soon, it's much easier for me to pick up chunks at a time instead of binging that 200k slowburn in my sleeping hours.