You're going about the whole thing backwards. You don't decide to make a new coin and then think of things to do. If you're going to start a new coin, address a problem that hasn't been addressed before. Create the coin to solve some kind of problem. Don't just pick some mining algorithm that's been used 100 times and then "brainstorm" ideas.
Start with the problem. The coin is the solution.
This is a very good way to look at it. Do you have any suggestions as to what are some problems that need to be solved?