As an Englishman I would find the word OK too non-descript. It doesn't really mean anything, there is no emotional pull to it. It is already used on command buttons as well (press OK to continue). How about the phrase 'Cool' ? Or a temperature scale (hot,warm,cool,cold,freezing etc).

Also it is worth discussing if there should be a negative version available (facebook don't have a dislike button for a reason), from a physiological point of view do you want people to see that if they post something see more they might get judged by the haters? Also, it can send out a negative impression of the content on your site to visitors.
 
 
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.
PET:0.11151695251465