Every beer must be reviewed, no matter how bad it was. Someone out there worked hard to brew it for you, might as well give them an honest opinion on their labor. Just make it constructive, unless it truly is terrible.
I am a dark beer man, my brews of choice are porters and stouts. I will not hesitate to drink junk lagers with my buddies though.
100th beer: Shipyard Blue Fin Stout
200th beer: Tommyknocker Butt Head Bock
300th Beer: The Bruery Trade Winds Tripel
400th Beer: ...