Without a doubt Curiositease, Sweet & Single, Strange Hybrid then maybe Captive. I bought Ramblin Rose and was immediately sorry - it goes orange on my lips
ETA - I dont wear MAC powder/foundation but I am an Ivory Beige in all other brands.
I wear Cosmo a ton, but I do sooo love Overload (now a D/C color). Fast Play is also nice. Pink Cabana is nice, but doesn't show much on me. Pink Poodle is one of my favorite l/g!!!