My all time favorite quote is from Duke Ellington (a jazz musician from before my time and waaay before yours). Talking about what makes music good he said: "If it sounds good, it is good."
In other words, it doesn't matter if it is country western, rock, or hip hop. It doesn't matter if it is hard to play or easy. If you like it - it's good. Of course if it's out of tune, or they is a boring beat, it probably won't sound that good to you so it wouldn't be good - to you anyway.
I have taken on the same idea for photography - "If it looks good, it is good." If something in a photo draws you in and keeps your interest, it's good. If an image makes you say something out loud when you look at it, like ewww, or ahhhh, or WOW!!!, it's good - at least for you and that's what counts. Again, if it's out of focus, or just another snapshot, it probably won't be good to as many people as an interesting shot that is well exposed and focused.
Also, the main difference between taking a snapshot and making a photograph is thought.