Hmm... no most are a scam - especially the TV ones. I watched the John Edward Cross thingy show on TV, what a load of rubbish that was, same for most other TV psychics, the John Edward ones always go something like this:
JE: Do you have an uncle called Egbert?
Person: OMG yes!
JE: And they are the other side?
P: ...yes...
JE: And they went like this, 1 2 3. Yes? *snaps fingers* 1 2 3, they went 1 2 3 bam, quickly, 1 2 3. They just went 1 2 3, they were here then 1 2 3 gone. Did they go like this 1 2 3?
P: *shaking* OMG yes, they did, they had a heart attack.
JE: Yes I can feel them. And you had a Great-Aunt Mergatroyd?
P: Wow, yes!
JE: And she a cat called Mittens?
P: umm... no...
JE: Well I'm getting a cat... Does anyone in this studio audience own a cat?
Second Person: Yes I do!
JE: Are they called Mittens?
SP: No...Michael
JE: I knew there was a cat - he's on the other side, yes?
...
And it just goes on and on and on like that, he doesn't tell them anything new, he just keeps telling them the names (sometimes not even that) of people who have died in their family.
So no, most are a scam. Although some like on Psychic Investigators sound completely real, they must be doing something right if they help the Police find missing people and bodies and stuff.
I might go to a palm reader or something just for fun, or to a psychic and feed them wrong info to see what they make up