I always wear a snorkel. Sometimes when I jump in the water I have to wait for my buddy before descending. I use the snorkel while I'm waiting. Again, after surfacing if I have to wait for the boat. Once, in a group, we couldn't find the wreck we were swimming to. As we started to run low on air on the return swim we ascended, did our safety stop while swimming, and then surfaced some distance from the boat. We could have signaled the boat to pick us up, but we all preferred to swim back, and for me, that's much easier face down using the snorkel. It never gets in my way, and it's never caused my mask to leak. It's a cheap open tube type. If water gets in, I blow it out. But I was a snorkeler for decades before learning scuba, so I'm comfortable with it.
I have a bad back, so I take my BC off in the water and let the DM lift it out for me. I find this easier to do and generally more comfortable using the snorkel. If there's no hurry getting back on the boat, I may splash around in the water for a while with my mask, fins, and snorkel. (No freediving after scuba, of course. Just splashing around on the surface.)