Well, some game scores have bothered me. Bioshock for example was scored incredibly high, but it was really a remake of System Shock 2 with better graphics/artwork but worse gameplay. My friend and I rented Call of Duty 4, but the lack of a cover system and the stupidly simplistic gameplay made us return it the next day. Not to mention we sat down and beat the campaign in 4 hours (5-6 my ass). For some reason that game is getting 9.5+ scores just for looking great.
Ratchet got incredible scores considering it was missing many features from the last R&C game such as online co-op and battles. Plus, it was 5 hours shorter, and much much easier. Super Paper Mario also seemed really over-rated. Not to mention any serious reviewer shouldn't be giving out more than a couple perfect 10s a year at the most. However, Orange Box, Halo 3, Metroid Prime 3, and hopefully Super Mario Galaxy all deserve great scores.