Normally, a large canvas can be more forgiving than a smaller one. It doesn't take as much detail because the viewer tends to be further away, whereas a small painting is more intimate. However, when working from photographs, I find the opposite can be true.

What is small in a photo is easy to recreate one-to-one, but when the canvas is three or four times larger, those small details become much more noticeable. A house in the distance that can be fudged with a smear of paint and a flick of the brush on an 8x10 canvas suddenly needs to be fully rendered when it's four inches square on the canvas. 

I already painted an 8x10 version of this one, but now that it's 18x22, there's a lot more to see.