Hey PF, I am a third year undergraduate who has been working in a HEP experimental group for two years. So I have had a good deal of experience with the research process, and I know basically what the grad students and postdocs spend their time on in my group. I am still completely clueless as to what a theory grad student does all day though?!? The experimental guys in my group spend a lot of time designing different analysis programs or doing one analysis or another or playing with monte carlos, etc. On a day to day basis what would a theory guy be doing? Sitting in front of a chalkboard thinking? Reading papers and writing commentary like a humanities student? Talking? I really have no idea and that should probably change before I apply for grad school... Thanks PF.