Ive said before that the few Iranians I have known, have had quite a lot in common with the British. They are a nation that had much progress, 'glory' and empire in its past, and this has an effect on the mindset of the present - pride, a sense that they should be dictating events, a feeling that they deserve to be respected.
And I dont think they are all that much of a threat. Their government is capable of some pretty horrible rhetoric, for example about Israel, but I think their top priority is the survival of the regime. Survival is incompatible with wiping Israel off the map, if they attacked Israel then they would be in big trouble. Therefore I assume most of the anti-Israeli rhetoric is just about appealing to some of their own population, rather than a real indicator of their intentions.
I am not familiar with Press TV but I have seen a little Iranian TV in the past, its kind of funny because their propaganda is distinctly old school and unsophisticated by modern standards.
I also find it hard to mention the Iranian regime without thinking about what caused their revolution in the first place. If the Iranian leader we supported back in the day hadnt been so brutal, the fundamentalists would probably not of had the opportunity to seize power there. All the same Iran is not short of pragmatic moderates, the rhetoric of their current president may disguise this somewhat, but there is far more to Iranian society and power structure than the fundamentalists.