For me I look at it all, but a really important one is audience retention, even if one of my videos gets a low amount of views but a good audience retention then I think, well that content wasn't what most of my subscribers wanted to see, but who watched it enjoyed it, so it was at least well made, also for some reason, despite good feedback from subscribers my channel seems to have come to a stand still regarding subscribers, I get maybe 5 a week now, it was at it's best over summer, so right now I don't tend to look at it that much, but it still feels great when you see a new subscriber.