I would really enjoy a creative server that allowed you to select the texture pack on the server. So you can build with a universal Resource Pack, while others can see it how you do. In addition, I would love to have different worlds dedicated to certain build styles, such as a Medieval world for Castle Buildings and such. Also, the server should have monthly build contests. Ultimately, I believe that this creative server should have a way to show off your builds, and build up your prestige in the community.