Some states make it difficult for expats abroad to stop paying state taxes. Some of the most expensive states are those ones. See most costly income tax states in article below.
http://www.gobankingrates.com/tax/top-10-most-expensive-states-file-taxes/
The states listed in this link are great for expats who do not want to worry about their home state trying to collect income taxes though they live and work abroad. Establishing residency in a tax free syate is good tax planning for expats who live in states with laws that make it difficult to avoid state taxes when an expat,
http://abcnews.go.com/Business/states-income-tax-us/t/story?id=21490926&ref=http%3A%2F%2Fnews.google.com%2F
