We introduce a new reservoir computer based on vertical cavity surface emitting semiconductor laser (VCSEL) with optical injection and arbitrary polarization optical feedback. By changing the feedback optical polarization angle and under parallel or orthogonal optical injection, we demonstrate that the introduction of new parameter (polarization angle) increases one degree of freedom of the system, making the parameters adjustment space much wider than parallel or orthogonal optical feedback ones. Via Nonlinear channel equalization benchmark task, the performance of such RC system is investigated, and the results indicate the system can yield good performance that can be compared with or better than similar reservoirs.