I'm not going to have a political debate on here - I've seen where that ends up far too often! However, I find it odd that nearly everyone you speak to believes that the BBC is not impartial but also believe it is biased in polar opposites to their own political persuasion whichever end of the spectrum.
I guess a lot depends on the programs/presenters you watch but the days of impartiality are I'm afraid, long gone.