In the user info, it would be nice to have plots marking for each question a little question mark and for each answer a little exclamation mark in the time-upvote plane, so that one can see at a single glance when someone has posted good questions or answers.
Note that this is different from the old reputation graph Eeeek! Where did the reputation graph go? which reported total reputation.
I suggest to provide a graph that shows for each question and answer a single mark ? or !, at the point in time (x-axis) where the question was asked or the answer was supplied, and with the net number of upvotes as height (y-axis). I'd like see all questions and answers in a single plot, with just one ? or ! mark in the time x votecount plane to summarize its value. This gives quite different and much more useful information.
If these marks are clickable and lead to the corresponding title and a link, this would be really useful!