McCain ISN'T Bush, regardless of how many time I'm told he is. He can/will be more effective at bringing change and fixing wrongs in our country than Bush has.
You're right though, it won't be by himself. He'll use his decades of independent thought to reach across the isle like he's done for years, likely more than any other Senator in my lifetime, and fix the problems we are facing. I trust McCain to do this more than I trust Obama, in spades. He'll be working with both a Democratic House and Senate, taking their priorities (often too far left) and bringing them more towards the center (where 70% of the country is).
It won't be alone for McCain, in contrast, if we elect Obama (which it looks like we will), he will be running the country alone. Democrats will have control over the entire government, and probably 60+ votes in the Senate to quash debate from the other side. There will be no mending of divides. There will be no compromise. There will be change, but it will be a complete 180 degree change, which only serves to further divide our country.
McCain as president will serve to bring our country together.
Obama as president will not.
At least that's my fear, and where my current thoughts lie. But I can't even make up my mind.