What do you want to be able to customize?
pasbesoin: Have the "comments" link text color, or something else, change to show that I've followed that "comments" link.  I sometimes only look at the comments, and would like a reminder that I've done so.Be able to "save" an item without upvoting it.  Upon occasion, I want to do the former for personal interest but am not sure that upvoting serves the interests of the community.  On the other hand, I can see where the current design may lessen fragmentation of interests and community focus.