Sorry but your question is just too vague for us to really help you. Start googling or visiting LFS's. I think you just need to put some effort into doing your own research and see what really catches your eye. Who cares how expensive or exotic others perceive the fish to be. Find what will help you get the most out of your tank for your level of interest. Join a club. Attend a convention. Visit AquaBid. Figure out what you like.