Your dad died from colon cancer at age 63. My mother also died from colon cancer - also at age 63. I just turned 63. I don't believe in magic numbers, but I'm taking this seriously. Family history is a red flag.
Colon cancer is the #2 killer, behind lung cancer. It's just not as cool to talk about as, say, breast cancer. There are no walkathons or bake sales or brown ribbons for colon cancer. Just sudden death for over 50,000 people a year, most of whom were taken by surprise because they thought a colonoscopy sounded icky.