I do. I also have an account for each person in the household, rather than us all just using the same account. And we don't operate normally in the administrative account: we've all got non-admin accounts and must occasionally enter admin credentials.
Old security habits die hard.
What I wish the Touch ID keyboard could do is INITIATE an account switch rather than just validate. If my partner has been using the iMac and I wish to switch to my account, I have to go to the account switcher menu, select a user (me), then enter the password. As I understand it, the Touch ID key will only do the last bit. I would love to be able to have it initiate the process at the beginning
But I haven't thought through how that would happen. Just idle dreaming.
EDIT:
I should clarify: our accounts each have passwords. I do NOT have them set to auto-lock after a period of time on their own. But to switch from one account to the other requires the password.