It all depends. If I pay USD 60 for a game and then am expected to pay for DLCs I would be pretty upset, but if the game is reasonably priced (say USD 50) then I would pay up to USD 5-10 for DLCs. At the end of the day it's all about the value you place on the product and for me a decent cricket game should be priced same as FIFA or Madden and I am willing to pay that amount (USD 60) either with or without DLCs.
But as you rightly mentioned I would expect the game to function as touted when I purchase it, and wouldn't want to pay for fixes like IC 2010's broken online gameplay.
For me it depends what the content is, measured against the price (countered by the initial price).
Blood Dragon is a totally new package laid on top of Far Cry 3, and is essentially a completely different experience 6 months later (or more!) that they've developed after the fact. I'll pay for that.
Launching a game at normal RRP and there's map packs etc already available for a extra fee? That to me smells like they cut some content out and want more money to unlock it. THAT I find a bit on the nose.