Ugly corals not worth it, especially those that take up space. Problem is once they start growing I get attached and feel bad getting rid of it LOL
Personally, I won't add ugly chalices and aggressive merulinid corals - unless they're especially nice specimens, they take up too much room imo.
Be prepared for your tastes to change. I originally wanted a xenia-only tank - hence my minimal starting equipment. Make sure if you get an invasive coral, that you can remove it later should you feel the need