I'd rather have the rating system be BS, S&A, FAIL, fail, meh, ok, win, WIN, yse, TSC. Now, for some examples of games that get these respective ratings.
BS: ET
S&A: Silver Surfer (NES), Gilligan's Island (NES)
FAIL: Sonic06, MMX6
fail: SA2, MMX7
meh: Sonic the Fighters, MM6
ok: Sonic Battle
win: SH, MMX8
WIN: ShtH, SA:DX, MMZ2, MMZX, SRA, SR
yse: Disgaea 2, MMZ3, SAdv3, Tales of the Abyss, MVC2, Alien vs Predator (arcade)
TSC: MM2, S3&K, Super Mario World, Chrono Trigger, Legend of Zelda, OoT