When I was younger, before I had kids and when I had time to sit for hours and immerse myself in a novel, I read to escape into whatever world the author of the day created for me. I suspended disbelief and inhaled the story until I got to the last page.
Now that I've been writing seriously for just over a year and have spent time giving and receiving critiques, something has changed in my reading style. Now when I read, even something I've read and loved before, I read it as if I'm reading to give a critique. I note what I like and don't like about word choice, imagery, the way the author handles transitions, chapter titles, everything. I can't help but stop when I encounter punctuation I would change.
I have to say it really is getting in the way of my enjoyment of reading.