A phone reading can be better than a face-to-face reading simply because your psychic can better read your pure energy. They won't be distracted by your gestures or facial expressions. It's usually much easier to talk openly over the phone than in person. Most importantly, both you and the psychic can choose the environments where you want to have your reading, leading to greater comfort and openness.
Text chat readings are nice for short, quick questions. They give you immediate answers and are very convenient. They are not necessarily good for long, involved questions, though, because texting is generally slower than talking. You also do not have the advantage of the personal contact that would be available over the phone or video chat. Also, while there is always a danger of becoming dependent on a clairvoyant or other psychic, the danger is increased with text readings. This is because of the ease and immediacy of these types of readings.