I like to be able to click on the pictures and enlarge them to see detail and the colors need to be true not altered. I also love it when they tell you what the item eats, what light requirements and flow requirements it has and also if it is territorial or passive. Fish compatability charts also come in handy. For equipment it needs to explain what size tank it is for and what other equipment is necessary to run it. It is nice when they have the corals organized into there similar species so you can skip stuff your not interested in.
Gosh I am not trying to be picky but I guess I am,
Carrie