Hi. I am going into my senior year as an undergraduate physics major. My intent is to go to grad school and most likely get my PhD. I am truly interested in physics, but I'm not sure I'm ready to commit to a specific grad program. I have a good idea of what I enjoy: fundamental particle physics, astronomy, and cosmology. However, I can't be sure exactly what I want to be doing. I don't feel like applying to grad schools while worrying about the GRE's and my semester grades will be most conducive to my making a correct decision. I really feel like I need to have time to put my everyday undergraduate worries out of my mind to make an intelligent decision. I have a few questions. Is it common for people to take time off and go back to grad school? Does it put you at a disadvantage? If it is reasonable to do, what order should I go about things? I would really appreciate any possible guidance.