Whatever is being investigated, created or produced now, in movies or TV, needs to consider the context in which it is being distributed. It's not a vacuum. There are certain universal themes of love, conflict, loyalty or family that are everlasting and that need to be presented in a way that makes it feel relevant, even if it's a period piece. You need to consider what context that film, that story and those characters are being seen in.
I don't try and write strong female characters or strong male characters, I just try and write, hopefully, strong characters and sometimes they happen to be female.
One of my favorite things about 'Star Trek' wasn't just the overt banter but the humor in that show about the relationships between the main characters and their reactions to the situations they would face; there was a lot of comedy in that show without ever breaking its reality.
To me the interesting main character is never the one without flaws.
I think that even if you're wondering if two characters are ever going to kiss, drawing out the inevitability is part of the fun. Whatever the genre happens to be.