I actually didn't have too many female behaviors until I decided to feminize a few years ago (I thought gender was a choice, silly me). Even with my female behaviors, people always told me I was like a dude (I didn't successfully feminize that much I guess). However, now I find myself struggling to unlearn these few things that certainly aren't who I wish to be perceived as; if this was me from the start, I wouldn't worry about it, but it is all stuff I've forced on myself to try to fit it. Now I worry that these behaviors, if I don't un-learn them, might make me come off as flamboyant or overly gay once I look more masculine. -_-
I do use feminine filler words a lot, unfortunately, and am working on taking them out of my daily vocab. The biggest struggle has been un-learning female speech patterns. I've always had a very male tone, but then spent a long time worrying about how masculine I sounded and tried to feminize that. Now, it's a long time struggle to un-learn my high pitches when I get excited, and my very fem "customer service voice". I'm making some progress, but it's definitely not at all easy. This is the main reason I hate hearing my own voice and try to avoid talking sometimes (I oftentimes have the urge to yell random things to people far away, but I'm too aware of my voice to let myself do it; I feel like I have to suppress myself).
For some reason, I'm able to speak in a very male tone when I talk to my dad, and only to him. I'm not sure if it's because he was the first male figure in my life, or simply because he's so dull it's hard to put much emotion into talking to him. But my goal is to be able to speak to everyone in that tone one day. It's just especially hard knowing that I'm capable of such a low tone, but end up going to my higher tone when speaking to most people.
I'm naturally transitioning right now, and the longer I do it, as well as the longer I dress male, the more my learned female body language has just kinda fallen out of me. I have noticed I walk more masculine sometimes, with my chest held higher--definitely feels more awkward now since I can't bind in everyday situations and my chest bounces more like this. -_-
I guess one day I'll be happy with where I'm at, but until then, every day will be some kind of struggle.