He is somewhat alternate, enigmatic and at times phlegmatic. He always calls it as he sees it, although at times, I’d some would prefer if he was somewhat a little more diplomatic with his comments about those who are clearly less-learned than he.
Whenever I bump into him, I am enthralled by his ריתחה דאורייתא and his very carefully researched contributions on the internet under a pseudonym. I speak about HaGaon R’ Dovid Segal, a child prodigy at Kfar Chabad whose chavrusa used to be the more well-known, but certainly no less a genius:.
If I am stuck in a סוגיא and/or seek to find the true Mekor for certain Dinim and Hanhagos, Dovid will disappear for a few moments, and come back with Seforim Hakdoshim, opened at the points that I should be looking at. He is a מעיין הנובע albeit a quirky one.
R’ Dovid doesn’t just learn יומם ולילה, he also possesses a strand of chessed which materialises in his התנדבות towards organisations such as the Montefiore Homes and Jewish Care where he makes himself available of his own free will and initiative.
If you have the time to set aside, this shiur will be well worth it. Just make sure he speaks slowly 🙂
I remember when he first came to Yeshivah, and was known as “Kagan’s Eidem”. He was widely proclaimed as a גאון אדיר.