I am really excited about seeing them actually attack the people. Because I always get the feeling that the Walkers are what really matters. The red woman whose name I can't spell expressed perfectly what I had been thinking most of the show. "Your war of five kings means nothing". That what's coming from the north is the actual problem for humanity and I find that awesome.
This is true, but I would suggest a line of thought that could be interesting: why are those creatures (that the book depicts as beautiful and angel-like, despite them being absolutely lethal) invading the south after more than 5000 years? Nothing happens by chance, and for sure nothing happens by chance in GRRM's universe. I dislike the idea of a evil-for-the-sake-of-it creatures that want to destroy humankind almost as much as George does, so I would give a thought to their motives and reasons, and most of all speculate on who they are and what their past might have been.
This reasoning is prompted by a number of very small and subtle hints sowed throughout the books, that the Others may not be the absolute evil we like to believe. In the series those hints are still to show up or have been dramatically downtoned to almost nothing in the past.