Unless you're shooting lots of video your reasons are moot.
Blasphemy!
No, actually his reasons are whatever he wants them to be.
I guarantee that if someone posted a bunch of shots without any information about what they were shot on that nobody here could tell whether they were shot with a Nikon or a Canon. Both are excellent devices, both are fully capable of excellent photographs in the right hands and junk in the wrong hands.
Scott,
I agree with the spirit of your post, that both are great cameras and flame wars are a pointless waste of time, however I will disagree that nobody here can tell if an image was shot on Canon or Nikon. If it's SOOC, and it's a technically correct capture, I feel pretty confident I could get at least a good number of them right, I imagine quite a folks who are regulars here also could.
Both brands have a certain "look' to them and there are definitely subtle differences between they render color.