I struggle to picture my characters in my head. Like, really struggle. At best I can get a very vague glimpse, though without being able to really nail down any specifics. At worst I picture a video game character I know, or a TV/movie character/actor. At the moment my two female leads look like Emma Watson and Bridget Regan. Obviously.*
I just can't do it. I can't visually create a person, and when my characters end up involuntarily looking like ones I know, it really hamstrings my ability to develop them as their own person.
Is this normal? Can writers usually picture their creations? Can YOU do it? If so, is there anything you find kick-starts/expedites the process?
*And obviously my three male leads are all me.