i choose not to use plastic plants, i had a stupid catfish that ate some and they tore a hole in his belly to get out. he survived that, but he didn't survive eating rocks..
i like silk plants though, they are anchored better and are more realistic looking and acting. even the plecos like the silk plants, they can eat the stuff that grows on them and they don't damage the plant.
otherwise, i prefer everything to be real, driftwood, plants and everything..