Take the Almost Perfect perk, and all S.P.E.C.I.A.L. statistics are instantly raised to 9.
Our grade: C+. By the time you reach level 30, you probably don't need the stats anyway.
With the Nuclear Anomaly perk, whenever your Health is reduced to 20 or less, you will erupt into a devastating nuclear explosion. Note that any allies in the vicinity will also suffer the effects of the blast!
Our grade: A. You're level 30 and have obviously seen everything Fallout 3 has to offer. Why not have a little fun?