Aggressive but he will need to solidify the secondary because he relies on man and blanket coverage to bring the heat up front:
Unlike the passive coverages and blitzes seen under Van Gorder, Mike Nolan employs a tenacious defense bent on pressuring the QB and overwhelming the offensive line. This involves blitzes from the LB corps, and coordination amongst the Front Seven. Nolan's aggressiveness leaves the secondary in some tight positions, relying on man coverage with safety blankets from the safeties. Thus with a solid secondary, Nolan is allowed to be more creative with his blitzes.
From his Atlanta stint...