If you look at your [activity list](http://tor.stackexchange.com/users/923/roya?tab=activity) in your parent profile, it's broken down pretty well. Votes, for the most part, don't make a lot of noise there. 

Sure, if you down-vote something, folks will see a small reputation change in your reputation history. But they don't see this if you up vote, vote to close, vote to delete, or vote to re-open a post. That's a little _too_ much of a ticker tape about how you use the site, and I think quite a few would be a bit uncomfortable if other users had the ability to track your _every_ move.

_Everything_ you do on the site will affect the 'last seen' portion of your profile, letting folks know if you're still around (useful if someone leaves a comment for you and wonders if they should stick around another 20 minutes or head outside). While who voted to close / delete / re-open something isn't _private_ information, you need to be on the particular post where the vote was cast in order to see it.