You want to consider a few things first. Will you be taking on investors, partners, or employees? You will not be able to issue stock to any investors, when bringing on a partner you will want an operating agreement since you are no longer the only decision maker in the company, and an LLC is liable for any damages an employee may cause. There are also additional expenses and obligations that you will have including fee to form an LLC, a separate LLC bank account, and most states have annual reports you must file as well as fees.  

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