Lurked anonymously for a few weeks, registered, and have been lurking ever since.
That's always suggested, that one lurk for a while, and then register, even if at the moment one doesn't have an intention to comment.
Lurking for a while makes one familiar with the style and manners of the board and its personalities.
I lurked at freerepublic for six years before I mustered the courage to register, and it was another year before I made my first comment; I'm not a forward person.
And by being a registered member but not commenting, one sees other things on a board that a lurker doesn't.