It's difficult to go into details, but lets say I became less focused and driven in both work and personal life, but also an easier person to work with. The kids perceived this evolution as very positive.

I'm on different medication now, but some effects appear to be irreversible.

I'm reading your combined posts as you having had mild anxiety that you weren't consciously aware of (aka high strung), and that the medication (partially?) addressed this without your realizing it.

That the effects were lasting (ie continued after you stopped taking the medication) just means the underlying causes were likely mental (ie conditioned or learned) as opposed to an inherent physical condition.

Good news! If you want it back just take stimulants - anxiety is one of the most prominent negative side effects of caffeine. (I'm only half joking here - most people will be familiar with the over-caffeinated and highly productive but difficult to work with coworker.)