Personally, I have thought about the possibility of a start-up company but within the biologics/pharmaceutical side. With that being said, I would prefer to create an LLC business. With a Limited Liability Company, I am protected from any liabilities within the present or future timescale. Laws in different states regarding LLCs are also widely accepted so I would have more freedom in choosing my home base through one of the startup incubators in the country. I would potentially start the company with another business owner if possible, that way responsibilities are shared and more can be accomplished. Also, as aaq2 mentioned above, I can make my schedule. In a sense, this can fall under the category of freelance/consulting. With an LLC, I have a lot of flexibility in my schedule and who I choose to run the company with me.