[goldenkey]

You are probably just anxious or you aren't thinking about what other people are listening for. A good speaker asks themselves what the objective is, and follows it directly. Other reasons might be: sounding whiney, squeeky, overly descriptive/ornate, or off-topic rambling. Those things are easily remedied by not talking to people about things they would find boring. ie. finding more aligned friends. Anyhow, good luck.