Besides the liability aspect, some owners create an LLC to avoid property tax on the plane. In Kansas, there's annual property tax (about 5% of book value) on personal aircraft, but not business aircraft (Texas is just the opposite). Some aircraft owners at my airport created "Delaware Corporation" to avoid KS property tax, but from what I was told it wasn't worth it for a 150-152 (although I had to pay $1000/yr for my '80 152, book value $20K, before it was exempted when reaching 30 yrs old).