The fact that not one supposed 'psychic' has succesfully claimed James Randi's prize money tells me that all psychics are frauds. Not one of them can prove any ability whatsoever, under controlled conditions. Until one of these con artists can actually prove an ability I will happily dismiss them for what they are, charlatans.
I do think people can be very intuitive (People can also be very niave on a not entirely un-related note), although not to some supposed spiritual realm that has no quantitative value. The question that I would ask is what does intuitive mean to you? I am assuming you mean some type of spiritual intuition but what does that phrase (or whatever you mean by the original question) mean to you?
Spirit guides? If I hear voices in the night I just bang on the wall and ask the neighours to to keep the noise down! But seriously, anybody who has someone else in their head telling them to say or do stuff needs professional psychiatric help, these sorts of mental disorders are well documented. Of course the other explanation is that they don't exist and that the person is just looking for attention or money.
The dead are just worm food and since all neural activity ceases after death then the dead aren't 'interested' in anything. If you have empirical evidence that this is not true please feel free to provide it.