It may be just me, but I dislike Oreos. It's probably the frosting, since I don't really like most cakes, save for tres leches and ice cream cakes. I much rather prefer chocolate chip cookies.
Also my favorite sweets are pretty much anything made from or have dark chocolate, coconut, and/or white chocolate (my favorites are Almond Joys/Mounds if it wasn't obvious). Also, Reese's Pieces are amazing.