Honestly it is probably dealing with the many different architectural review boards. Of course there are a lot of strict wind, earthquake, FEMA, and building codes in our area, but once you learn and implement them over and over, that of course always stays a challenge, but one you get used to. The review boards are all different, with their requirements, zoning regulations, design ideas, etc. and you have to be methodical in reviewing their neighborhood/ island/ jurisdictions design guidelines and doing your best to meet them while also achieving your clients visions. Often I will meet with the review board administrators up front and have very good lines of communication with them which seems to make the process smoother and get everyone on the same page from the beginning.