If I use Imation Defender for my own purposes, should I just be a device Administrator since I am the only user?
This is not advisable. For the F100, F150, F200, H100 and H200 it is recommended that you always create an administrator with a reliable means to authenticate (be it password or bio-metric) and then define a second user for your day to day use. The administrator account has privileges that you don’t want to be exposed if, for example, you leave your device unlocked and unattended.
The administrator password can be created with any combination of up to 128 characters. It is therefore very secure and resistant to unauthorized access.
NOTE: The Defender F50 does not have the Administrator capability.