Don't be afrade of getting the standard procedure. It really is nothing, and it could be life saving. You don't even know when they are doing it. Totally painless.
Since I do not smoke, drink little, am not overweight, am not yet elderly, and do not have a family history of colon cancer, I lack the greatest risk factors for colon cancer. My doctor has therefore not pressed me to get a colonoscopy.
Meanwhile, I have a more pressing requirement for a head MRI every year or two to monitor the residue of a benign pituitary tumor that remained after two surgeries. If the residue starts growing, I will need radiation treatments. If I am lucky, the residue will gradually disappear without further intervention. On the whole, that worries me more than getting a colonoscopy.