I guess I tend to be happiest with a render when at least one aspect of it has involved an exploration of something new... or some part of doing it has expanded my understanding and knowledge about the medium and software.

I'd say I'm definitely in the same camp as primorge, when it comes to meandering.

I guess I like to share my results though... so I'm not inclined to be shy of posting renders, many of which are really just in the WIP category.

I suppose "complete" for me is just the point I think "that'll do for now", then get caught up on the next idea...

I'm not too much of a perfectionist, in many ways...