My own Sir was experienced and being my first(and only) Dom, I trust Him to tell me things I need to improve on in my submission as well as be open enough for me to tell Him what is in my comfort zone at the time. He is patient and understanding where I've had some experience with those who beleive themselves Dominant (laughably so in some cases) who basically want a mommy figure to top them who are impatient and don't care about the sub.
I know that everyone has to start somewhere, but I never found myself pulled to a man that I could top, even if he was learning. But again this is what I needed in a Dom, someone confident and intelligent enough to handle me, my quirks, and my baggage. (I have so much I had to check it at the airport, seriously)
I've had relationships in which I've been told that I'm too much to handle or that I'm (and I quote) the type of woman that should never be pinned down, I need to run free without a collar or ties, when all I wanted was a collar and to be tied. (Some of these were people attempting to "man up" for me). An experienced Dom would have (and did) see the need I felt and snatched up the opportunity, while an inexperienced may have seen me as another Domme.