Filamentous bacteriophages with their features like outstanding monodispersity and their ability to self-organize into a myriad of ordered structures motivate the strong interest they have raised as model systems of particles in soft condensed matter and as genetically tunable scaffolds in biotechnology and nanoscience. In this talk, we will show some recent advances in the phase behavior of such phage suspensions including self-diffusion experiments where we benefited from the direct visualization at the single particle level of viral particles. Specifically, we will outline the role of confinement and topological defects in the chirality transfer from particle to supramolecular structure level during self-assembly processes. Finally, recent investigations on phage based hybrid complex particles will be presented, paving the way of new building blocks for biomaterials.