Curly. Easier to straighten than straight hair is to curl, generally (unless you have afro-style). Either can look good though, depending on the person. I think straight hair tends to look more tidy most of the time.
My hair is straight as a board. Wouldn't want it any other way. Wash and go. Thank God I live in California cause the dry heat drys it in about 20 minutes. If I am on location where there is humidity. It takes 1 hr to blow dry. So yes I love my straight hair.