In my own opinion yes, but this is because interest rates have been ridiculously low and I'd want to lock down terms going forward. The risk of a variable interest or balloon loan is that your payments can go up and down, and if interest rates go up then your payments could be much more than you're paying now. This creates serious problems for consumers who can afford paymets during low interest periods and are not prepared for larger payments when interest rates go up.
If you're a gambling person, you can consider a variable interest rate, but with current rates so low I would suggest your locking in for long-term contracts.