I will be at a midnight launch and playing it not long after, but not stopping for a long while after. Forget waiting for GOTY edition I'll be buying DLC as it comes out.
I'll be watching lots of youtube videos of gameplay footage before buying it. And if there is going to be a GOTY version, I won't mind waiting a year or two before buying it.
I can't stand buggy games or DLC so I'll be waiting until the game of the year/all dlc bundled and patched edition is $20. Until then I'll borrow a friend's copy.