Hi Sherry,
Welcome to APF. Like you, I try to collect by themes... I have a lot of sub collections, probably too many as it has become very difficult to service them all. I guess it is a testament to how expansive cinema is. But it is fun. My main one is Spielberg (1,400 posters), but I also collect Bardot, Argento, Truffaut, Godard, Monroe (a new addition), Eastwood, Bond, Deneuve, Hitchcock, blah blah blah, you get the gist. Like I said, too many. I'm guessing Wayne is your #1.
Anyhow, enjoy APF.
Thierry