Features you want in your favorite SNS?

Do you have any features that you want to be present in your favorite social networking sites? Honestly, in Twitter, I wish to have an "Edit" button similar to Facebook. Sometimes, there are tweets that I tend to overlook when posting it. There are grammatical errors, which are most of time embarrassing. Another is the trending hashtags for Facebook. I just want to see those trending hashtags similar to Twitter in Facebook.

Do you have any features that you want to be present in your favorite social networking sites? Honestly, in Twitter, I wish to have an "Edit" button similar to Facebook. Sometimes, there are tweets that I tend to overlook when posting it. There are grammatical errors, which are most of time embarrassing. Another is the trending hashtags for Facebook. I just want to see those trending hashtags similar to Twitter in Facebook.

Twiter also needs to up their character limit.