avoid enum from this reasons
The bottom line is that ENUM has its place, but should be used sparingly. The model should enforce the constraints, not the database; the model should handle interpreting raw data into useful information for your views, not the database.
BOOLEAN type is there for a reason. It is indeed a TINYINT(1) but since it's there, it must be the recommended way.
BOOLEAN
TINYINT(1)
Also, ENUM is a non-standard MySql extension. You should avoid it, especially if you can achieve the same results in a standard way.
ENUM