Why do we always want to break the rules and go against our better judgement and keep adding more and more to our displays until nothing is healthy? Remember 1" of fish for every 5 gallons, and that rule can be broken depending on how good your filtration is, water parameters, water changes, etc, etc. As far as what to put in your tank, put in what you like. Just know that everything you like may not live well together. Are you wanting an agressive tank, a peaceful reef? Find the fish you most want to have and determine what is compatible to it. This may change your mind on what you most want to have.