I find Lawrence Krauss interesting to listen to, too (and I have all of his books as well). I prefer him to Brian Cox (but I can see why Brian Cox is so popular). My first degree was in Astrophysics (but back in 1977) specialising in Cosmology, and I find Krauss a more informative populariser of science than Cox....I've found several really bad mistakes in one of Cox's books. Not simple errors but illustrations of whole concepts in layman's terms where the illustration is basically flawed, to a degree where it's misleading.
Staying current at the "technical" level is impossible for me due to other commitments (and my maths has atrophied badly too) so following people like Krauss is a useful way for me to update myself without having to wade through reams of equations. He's a very accessible communicator for a broad spectrum of people.