I would like to see WP registration themed and integrated into the regular look of my site, as well as greater control over a simplified user control panel. Currently I have no interest in letting anyone register simply because I have very little control over the user experience once they go behind-the-scenes. This is not optimal by any means--consider, for example, all the users unfamiliar with the purpose of most functions found in the back-end. There should be some kind of "basic subscriber" class of user where they can monitor the comments they have submitted and adjust their profile details in a simple fashion. Currently it would require a lot of hacking around to get anything like that in place. WordPress needs better user functionality all the way from registration to the backend user experience.