You have a great full beard! If you want an even bigger one, stop trimming the neck, since it is covered over anyway and do a natural cheek line as well. The cheek area will grow fast enough and blend in very quickly, so do not worry about that. I have to forwarn you that as your beard gets bigger, you will get more attached to it and very well may not want to stop at 6 months of growth. Well that happened to me anyway and countless other guys who started to grow big beards. A yeard on you would be awesome, so keep on growing is my advice.