Philosophical Logic is concerned with the study of argument, meaning, and truth. It is very familiar with informal logic in that it can touch several different systems of logic. This logic and informal logic both have a similar leaning in that they seek to figure out arguments, statements, and beliefs however is possible.
For me personally my own argumentation and logic style is built on philosophical and informal logic. The main reason for this is the importance and value placed on human value and judgement. Some logic systems can exist and be focused completely on non human content, mathematical logic for example (although it can also be concerned with human content as well).