I shall answer my own questions here... meant to do that earlier, but had to get some work done first!
I totally have my comfort zones as a reader. Literary fiction, historical fiction, classic literature and some nonfiction (medicine/health, science, memoirs, 'issues' books current or historical). I also really enjoy some mystery novels. I tend to shy away from horror and romance novels.
I do try to stretch outside of my comfort zone - usually into the science fiction realms. In theory, this genre should be perfect for me. In practice, it's been very hit or miss. But I keep trying. And I have found success when I push myself. I don't tend to read a lot of YA, but sometimes I try books out to see if they would appeal to nieces or nephews. The Fault in Our Stars totally surprised me with how much I liked it!! I also LOVED The Long Way to a Small Angry Planet. This book was on my radar because of a friend. Then it was longlisted for the Baileys Women's Prize for Fiction in 2016. I cannot overstate my love for this book and I am so glad I read it.
Overall, thought, I do feel it's important that I read more broadly. I also have different reading projects on the go at any given time. This year, I am trying to read more works in translation, and also read more internationally.