S-Corp - if your business is earning a lot of profit it can make sense to pay yourself a salary and the remainder of profit as a distribution, which is not subject to the 15% self-employment tax: https://turbotax.intuit.com/tax-tools/tax-tips/Small-Busines...
C-Corp - For a company you founded a QSBS or Qualified Small Business Stock can be excluded (in whole or in part) from capital gain taxes. So, as your company grows year after year, and it's valuation rises year over year, this can save a lot of money when selling: http://www.lexology.com/library/detail.aspx?g=dde20f35-2d5e-...