Just depends on what you feel like.
Like Catrin said, you don't have to ride clipless to be a "big girl" or a "real" cyclist.
I rode with toe clips for decades, then took a bike skills class AND STOPPED IN THE MIDDLE OF CLASS to remove my toe clips. The wild things we did in class made it very clear to me that my beloved toe clips had some limitations.
Later I got Speedplay Frogs (IMHO the easiest and most foolproof of all the clipless systems, which is why I bought them). Loved them.
Rode a bike with BMX pedals (the huge flat things with pins sticking up all over them like hedgehogs). Fell in love with them, and now have BMX pedals on all my bikes.
Platforms, BMX, clipless, toe clips - doesn't matter. The most important thing is that you have a pedal wrench and know how to use it!
Have a wardrobe of pedals just like you have a wardrobe of clothes, and change whenever you feel like it! THAT'S where all the fun is!
Every woman should have her own pedal wrench and her own vibrator, and know how to use both.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson