I make a point of copying the citation as given. The only exception is when I spend a LOT of time going through the images to find the exact record. Then I will sub in the link to the image, so others don't have to hunt through potentially a few hundred years worth of church registers.
Same with Find a Grave. I copy their citation, and only sub in the template for the memorial ID#.
I used to do my own FreeCen citation, but since they now offer a Wikitree citation, I use it instead.