Charles said:

What's with this pattern of starting thread titles with OMG! ? Why did it start? From where did it emerge? What does it mean? What's going here? What's next?

C

Like many before, the “OMG!” title starter was passed down through generation after generation until it was bestowed on me, it is thus my duty that I continue its tradition and bless this post with its might power.

... seriously though, I have no idea, I just felt the urge to conform