I want the fewest amount of inboxes as possible. Having to read private messages from multiple social networks detract from that.
I like that Flickr and Twitter send the full text of the message to your email address (if you request those notifications). Plus, Flickr allows you delete all your inbox messages easily – Twitter needs to add this feature.
I have my email address listed everywhere. Why can’t you just go with that?
Post inspired by Paul Stamatiou, “Why Private Messages Suck“