oh, and ghoul reavers. the first time i met one i thought it was a regular roamer so i let it get close (hmm..) and blasted it in the face with a shotgun (to save my A3-21 rifle's ammo of course) when it only took one bar of health off the 30 or so bars that are there, i was worried. then it swiped me, and i was knocked backwards and 1/4 of my health disappeared.
i ended up wasting 10 alien blaster rounds and all my stimpaks trying to kill it. not cool, bethesda, not cool.
of course, at level 30 it's not so bad now, they're relatively easy to put down with a normal energy rifle...but still. much respect must be paid to some of the new fallout 3 enemies..
..deathclaws are a joke.