I've seen in other forums were you can get up voted, down voted, Or even thanked.

You can up vote great answers and awesome Screen shots that you like.

And even have a optional go to best answer.  

Lets leave the down votes outs tho, we don't need any negative waves around here. 

Idea around this is you see a lot of thread traffic, but not a lot of replying sometimes.  And sometimes you just want to find the answer with out reading all the fluff.  Then thank someone for helping.  

Someppl geek out over things like that.