I don't own L'Homme, L'Homme Eau d'Eté, M7 Fresh, or Opium Pour Homme Eau d'Orient.
My favorites of the remaining fragrances are M7 and Kouros. My least favorite is Body Kouros because it seems to be a rather linear vanilla fragrance on my skin. Makes me smell like a snickerdoodle.
Still, I respect that it "works" for lots of other people. I will give it another try this winter.
YSL is my favorite designer fragrance house at this time.