I think I'd place myself somewhere between A and B... perhaps A.5 or something ridiculous like that. Depending on the kind of mood I'min when i visit the site, I'll be more or less likely to give something a chance. My eye will always ALWAYS go the icon first and foremost. Art style and coloring has never been a factor to me, but I feel like a person's icon says quite a bit about them; it's the first view a potential fan has of your series, and that should always be considered in my opinion. What is the first impression you want to make? You can spend a lot of time, pulling apart the psychology of different colors, compositions, expressions, and any number of things to perfect an icon, or play it by intuition. What would pull you in if you were browsing? What represents the theme of your story in an intriguing way?
Next, I tend to consider the title. To be fair, titles never seem to make or break my decisions, but if there is a title that I find particularly witty, mysterious, or clever, I will definitely check it out regardless of art or my usual preferences, just to feel out the creator's sense of story / aesthetic.
I do my best to give everything consideration, as there is just about an infinite amount of ways to interpret any given thing. But I confess, the icon is my main attraction. 