AfterDark
Contributor
I don't use a snorkel unless I'm DMing an OW class. When I'm diving for pleasure, a snorkel wouldn't work but not for any of the reasons mentioned thus far. Take a look at my avatar. If you can find a way for a snorkel to work with a full face mask, then maybe I"ll consider diving with one. Otherwise, I have a surface air valve (SAV) for time spent on the surface. I could probably carry a pocket snorkel, just as I carry a spare mask on every dive and a spare 2nd stage w/ a QD fitting in case I ever need it (and I did last summer in Cozumel), but things would have to go really awry for me to need it. I'd have to have problems forcing me out of my ffm into a conventional mask and reg setup and then I'd have to have considerable time on the surface after that. When I'm boat diving, I generally try to stay a few feet below the surface under the chop to avoid motion sickness. So even then, I'd more than likely be on my reg.
I certainly don't condemn others for their choice of what gear to dive, though. It's their dive and it's up to them to do what makes them comfortable. I just make certain I know what they're diving if I'm buddying with them (or even if I'm not) so I know how to handle a situation if it arises.
surface air valve a snorkel with a different design and name but provides the same advantage. I like it.