Assuming one wears his Tzitzis out , is there a preference to leaving only the strings out but the knots in, or is it better to leave out the knots as well?
I teach in a Yeshiva for Baalei Teshuva and I have noticed that a significant amount of them wear the strings out, but among "FFB"'s-frum from birth, including myself seem to leave the strings out and tuck in the knots.
Are there any sources that would suggest there is a preference?