Reddit to me serves a completely different purpose from GMail, Facebook, and Google+. Those are for using the internet to talk to people I know (or knew) by real name.
If Facebook was pseudonymous I would never touch it again. The only advantage it presents over email is that I can find out about and message someone in my real-world life when all I know is their name. It's email without the need for an address book.
Reddit is a community in its own right, just like HN, so it makes sense to have separate identities in those spheres. That's not an argument for letting my friends make me discover and remember AIM-esque screennames just to send them messages.
If Facebook was pseudonymous I would never touch it again. The only advantage it presents over email is that I can find out about and message someone in my real-world life when all I know is their name. It's email without the need for an address book.
Reddit is a community in its own right, just like HN, so it makes sense to have separate identities in those spheres. That's not an argument for letting my friends make me discover and remember AIM-esque screennames just to send them messages.