I usually read fiction and I tend to read them quickly. Even the non-racy ones. Like many others here, once I have picked up a story, I find it difficult to leave it in between. Just can't slow down or spread it over time.
However, recently I picked up some philosophy books (totally a newbie there!). There I felt the need to read slowly, in smaller chunks - to digest the essence. But I am still getting used to this way of reading. I find that after I stop, I often get distracted and pick it up after a long gap. Then I feel the need to go back to what I had read before proceeding further. Still feeling my way around