I would like to see points displayed after voting. I think they have more information content when hidden before the voting takes place, but I think it's useful information.
I've never seen "fights" over karma scores, especially over the difference between +2 vs. +20 (downvoted posts are visible by color). Usually posts about upvoting or downvoting (i.e. "Why is this crap at +20?" or "Stop downvoting me" or my favorite, "I know this will get downvoted but...") get downvoted hard and people learn that the community dislikes them.
I've never seen "fights" over karma scores, especially over the difference between +2 vs. +20 (downvoted posts are visible by color). Usually posts about upvoting or downvoting (i.e. "Why is this crap at +20?" or "Stop downvoting me" or my favorite, "I know this will get downvoted but...") get downvoted hard and people learn that the community dislikes them.