In my experience I do not think that shyness is a turn off - I am pretty shy.
Are people that talk all the time always the once with girls?
Johnny Depp… A guy that all girls want, and he is not a guy that’s talks a lot.
The point is that I think girls would actually often prefer the mysterious guy rather than the budy builder in the local gym.
To cite a huge cliché, but that is actually true: It’s all about being yourself. However to be yourself is not to second guess what you think the girls want to hear, but to talk about something that you both find interesting or at least that you find interesting
Anyway the best of luck from here with your future girl friends – trust me when you get one your dreaming of the days when you were single.