All of the above really. When it all comes together a great picture emerges...if just one of those is not there...then you can tell that something just isn't quite right about the picture.

As for those I photo's I really appreciate, I'd have to say I love when there's a clarity, smoothness, or sharpness to the photo which can be achieved even when there is a very shallow depth of field (I love those types of pics). Hope that makes sense, cause a lot of the time I can't quite pick out exactly what it is I like abt it.