This is an interesting question, to which I think there is no right answer. Firstly, like what was said, developing your personal style is something that comes naturally. But I am going to argue that your music is already intrinsically laden with your own personal style.
To start off, it is important to define what style means for you. I'm going to assume here that one's musical "style" would be a set of characteristics that is present throughout the majority of one's works. These characteristics could range from melodic phrasing to instrument design or to harmonic use -- but the point here is that these characteristics could be anything and are present often. With such a broad definition of what these characteristics could be (and thus in turn, a broad definition of what musical style could be), I think it is rather hard for one's music to lack style. What I mean by this is that you are probably already injecting your music with little quirks.
Think about how you make your instruments, for example. I'm going to assume that you don't *always* create every instrument in your songs from scratch, but instead have a library of pre-made sounds or 'templates'. From there you would tweak these templates (or maybe you wouldn't) and start using them in your song. Though the sounds would be different, they would still have a sort of distinct "you-ness" to them, because they stem from a common base. Maybe you have a lead that you really like, and use it quite often in your music but with minimal differences. All of this would be an example of your music sharing characteristics, and thus you developing a "Style". I could keep listing other things musicians do, but that would be redundant. I hope you see my point.
It is natural for composers to create shortcuts for themselves. Little go-to things that they put into each of their songs to speed up the composing process. It is these little go-to things that essentially define your style, I believe, and thus since this process is natural, so to is the development of style. Plus, it would seem odd for someone to claim that a musical work lacks style -- I am willing to bet that if anyone were to listen to the entirety of a composer's work in depth, they would start to pick up on the little nuances in their style. So much so that when a new song of theirs were to play, a listener could say: "Hey, that's 'x'!".
Style is all about patterns. Common patterns. You naturally fall into patterns as you compose, and listeners naturally pick up on your unique patterns as they listen to your work. I do not think this is an issue that you should worry about, as I am almost certain that your music already has a definitive Metatronaut style. Unless you're just plagiarizing every single little nuance of some other composer; if you're composing your own music, you have a style. It's there, and it will keep developing.
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Perhaps a more useful suggestion would be to listen to a wide variety of music. Oftentimes, the most interesting artists are the ones who stretch beyond their "genre" to incorporate intriguing elements and instrumentation. Also, the genre is dead.