colors don't have a real "gender" because throughout history and cultures the meanings and connotations have varied. For example, pre-ww2 pink was a "boy color"
but anyway there is nothing "weird" about having a favorite color. it just depends on what is pleasing to you personally. I love pastels, and I'm not a girl. it isn't about gender at all.
pink, purple, and lavender are lovely colors!
Purple is actually my favorite color ever, so excellent choice. 💜