Generally speaking, the comedic styles of the members of the Frat Pack simply do not work for me. More often than not, I find that the actors of this self appointed group act more or less the same in every movie. But occasionally (i.e. usually before their comedy careers took off), they deliver against type performances that leave me wholly impressed. To help define which actors belong to the Frat Pack, feel free to use this link as a resource.
Head to Movie Mezzanine for the full list