Hallucinations are not the main symptoms of schizophrenia. Rather, hallucinations are accessory symptoms present in some forms of schizophrenia. They are usually acoustic but can be also tactile, olfactory or gustative. Hallucinations are usually followed by delusive ideas.
There are 4 main types of schizophrenia: hebephrenic, simplex, catatonic and paranoid. Symptoms that are present in all types of schizophrenia (main symptoms) are:
1. disorders of associations (disturbed thinking processes);
2. lost emotions (apathy, lost ability for joy or sorrow);
3. ambivalence (the presence of two opposing ideas, attitudes, or emotions at the same time), and
4. Autism (a condition where the contact with reality is lost but the consciousness is still present)
Accessory symptoms present only in some types of schizophrenia include:
1. hallucinations;
2. delusive ideas;
3. catatonic symptoms;
4. poor and bizarre speech etc.
Hallucinations and delusive ideas are typical during paranoid schizophrenia. Most people can’t understand a schizophrenic's delusive thoughts because these people live quite literally in their own world.

There are actually 5 types of schizophrenia, not 4. Hebephrenic is the old term for "disorganized" schizophrenia and I think what you mean by "simplex" (never heard that term) is "residual" schizophrenia, and the others are paranoid, catatonic and the one you forgot is undifferentiated schizophrenia, making it 5 subtypes. Are you using the ICD 10 or the DSM IV? Maybe in the ICD 10 its different than the DSM IV.

I don't know if this is any help at all as the only hallucination I've really ever had is that static things have come alive somehow. Like for instance I see snakes in things - although once I imagined I saw a train go past where there was none... it was like I knew it wasn't real but I saw it anyway and it seemed real somehow.

Mostly for me however when I'm psychotic it's like reality takes on a different reality and people are not who are they are - they are all part of some conspiracy against me or something. Like in retrospect when I'm lucid like I am now on my medication I call what I experience the "theatre of hate".

As a final note what I don't think people realise sometimes is just how frightening it can be when it's happening.

My Mom's schizophrenic(paranoid), and she mostly hears talking and smells things that aren't there. I believe that hallucinating touch is rare, and they've caught criminals faking because they pretended to touch imaginary people. She's reclusive and has a difficult time relating to others. Just like kaz79 she's got a fear of snakes, and i'm thinking she sees them when they're not there. If i had to sum up how she thinks i'd say she unconsiously forms reality to meet her desires. She'll make up something right in front of me, but absolutly believes in it, and gets angry when i tell her it's not true. Even when i'm there with her she's not always totally in the same reality i'm in. I don't know about the other types but with her paranoia she's got hatred toward others, and a big overestimation of how many years she's worked, and how much she's entitled too. I don't think she's ever felt like the tv or newspaper was talking to her. I think they act out because their brain is sending information that is just as real as any of the input you or I receive. It so happens that the input that the brain is sending is not real. Imagine you felt the pain of putting your hand into a pot of boiling water, even if you're sitting at the kitchen table it'd still be really hard not to react and jerk your hand away from the pain. I imagine that's what it's like. Of course this is only my observation, she's the one with the disorder. Hope this helps,
Ben

I tend to hear people that aren't there, freak out because i think that there are people hiding just around the corner and i can see their shadows (other people cant see any shadows at all) and sometimes i see a man completely black. Black clothes and black skin with no features. He stands their and sometimes talks to me.