{Let me apologize for taking so long to get back to this, but the news from my initial round of treatments was so good, I felt less like reminiscing.  Things change.}

By week 12 (my 7th infusion) I was taken off the Oxaliplatin because I was beginning to suffer neuropathy problems - severe tingling of fingertips and toes which gradually started to become numbness ... to the point that I had even burned myself slightly (apparently) on the oven without realizing it.  My doctor felt that was enough to justify discontinuing the Oxy.  

The problem is that Oxaliplatin is the go-to drug for colon cancer, and discontinuing it meant I was not getting the most complete treatment I ought to have been getting.

By and large, chemo treatments are going to be a matter of trade-offs.  On the one hand, you have cancer - the cells in your body are malfunctioning to the point where you could die; on the other hand, you have the means to try to arrest the cancer, but there is the simple fact that the process of killing off cancer cells also involves killing off normal cells.  Your body's systems are adversely affected, there are side effects that accompany the drugs (frequently), and the process can make you feel worse than the cancer itself.  (Besides the neuropathy, my fingernails thinned out and themselves became hazardous to me, as they could cut adjacent fingers by becoming fairly razor sharp - requiring careful trimming; my appetite was off, and at times had to force myself to eat something; I was tired most of the day during the 7-day treatment, and the week off was usually not too energetic, either)

I will be the first to say that, based on what others have said, I got off fairly lightly - I could still function.  Some cancer patients are so adversely affected that they have to take extended leave from work, as well as otherwise cutting back on their activities.

The payoff: after 24 weeks, just a couple of weeks before Christmas, I had my last infusion.