From your use of the word affinity meaning?a natural liking for or attraction to a person, thing, idea, etc... and being a strong follower of the goddess Nyx your probably a fellow reader of the House of the Night novels which has a warped view of the Greek goddess Nyx. In the series she's still a goddess but is the goddess of vampires. Vampires (in the series as they aren't real) sometimes have an affinity for and the ability to call forth & control one or in rare occasions all 5 elements referred to in the series as earth, air, water, fire, and spirit. On your profile it says something about you feel in touch with fire and air I believe. In reality this is really all an affinity is, a feeling or connection to an element. It can sometimes relate to ones Zodiac sign but not always and you can work with any element. My elements are air (relates to my zodiac sign) and earth because I feel strongly drawn to air and it and earth relate to my personality. For example I have a strong imagination, a bit of a dreamer, do a lot of thinking, artistic, etc... which relates to air but I'm also well grounded, realistic, etc... which relates to earth. You seem already drawn to two elements so it seems like you have your answer. I hope this helps.
I'm sorry you read my post and thought I was mocking you in some way or insulting you. I meant no insult but I haven't seen the word affinity used often and the fact that your a follower of Nyx made me think you might have been misinformed via that series as many people become interested in magick out of the result of books, movies, tv shows, etc... and you seemed new to the site. From your profile you also seemed to be asking a question you already knew the answer to so I assumed you were looking for something more than just a connection to the elements. I also did not intend to insult Nyx though I'm sure if she were aware of the series she might be slightly insulted at their existence and her portrayal in them. I was honestly trying to be helpful and I hope at least some of what I said was although I'm guessing none of it was. Once again I'm sorry for any ill will I might have caused.