Just to clarify things perfectly, let me say the exact opposite to janderson
My Liver resection (60% removed, open surgery) was CONSIDERABLY less pain and discomfort and hassle than my resection, although I was rectal, not colon.
For my LAR I had an epidural, for my liver I didn't and I never went above 2 or 3 on pain (except when moving significantly like getting out of bed) on either.
I was in hospital longer for my liver resection (10 days) but the last few days were purely because I had some drains still in that wouldn't stop emitting fluid - I had otherwise already healed pretty well by then. I get the idea we spend longer on the ward here in Europe anyway.
Epidurals have one significant drawback for men - When it comes to removing the foley things can take while to get back on track.