I work as a nurse in a Nursing Home (very vulnerable population to Covid). I wear a mask AND safety glasses when at work. I also wear a good quality, washable, non medical mask when I'm out and about and when shopping and stuff.
The advantages:
Protect my patient, my colleagues and myself at work (top priority);
Protect my community and myself on my own time;
People can't see me yawn when I'm tired (lol);
My sometimes not-so-professional facial expressions are hidden
The disadvantages:
My patients (who have low hearing, often dementia, etc) have trouble hearing me.
I can't use slightly exagerated facial expressions, which help a person who has low hearing or cognitive difficulties understand me and have social engagement (I use smiles and expressive eyes to communicate with many of my patients)
At work and on my off time, I also wear a chemo cap (a nice one that matches my work dresses and off duty dresses). I wear these to protect my hair. I change into my work cap and back into my off duty cap at end of shift. This way I can just rinse or condition my hair without worrying about excessive, drying shampooing. The caps also indicate to others that I MAY be immuno compromised and to not-be-a-jerk-because-I'm-wearing-a-mask. Sadly, even in Canada, we have anti-maskers,although they are much less common than in the US. Besides, on the West Coast, we are pretty laid back )
I don't mind wearing them. It gets a little hot in the summer, but, other than that, in my off time in the community - I like wearing them.