It's not your liabilities you need to worry about per-se, but rather your contingent liabilities. You are not going to form an LLC and run out and get a bank, vendor, etc. to loan you money without a personal guarantee. You very well might have a customer who thinks you made them sick and decides to sue you. Now you will be very happy that you have the corporate veil of an LLC between your company and everything else you own.
As noted above, you do have minimum corporate governance requirements - board meetings, minute books, no intermingling assets, not sufficiently capitalized, etc - that you must maintain, or the courts may say your corporation has not been treated as a separate legal person and let the plaintiff go after your personal assets anyway.
The main downside of a corporation is double taxation, but you can manage this to a large extent.