Certainly almost everything we do and think is colored in some way by memes, but it is important to realize that not everything we experience is a meme. If I walk down the street and see a tree, the basic perception that's going on is not memetic.
When I say that consciousness is an illusion I do not mean that consciousness does not exist. I mean that consciousness is not what it appears to be. If it seems to be a continuous stream of rich and detailed experiences, happening one after the other to a conscious person, this is the illusion.