As it is, we have plenty of useful skills. However there are just as many, if not more, that need to be overhauled and update. New skills however can promote other skills making them more sought after Ex: Summoning to Hunter, Farming to Herblore. If they can continue on the trend of Summoning we will see skills that promote the use of other skills to make them more enjoyable. Now if I had to say what I look for in a new skill, I'd have to say I'm looking for something different. When Construction first came out it was amazing because there was all these new concepts and things, and just the whole aspect of doing something new appealed to me. So if Jagex could put in a new skill that was useful to other skills, but at the same time, nothing we have ever experience, then I will think that it is a great new skill.