I am a long-time LBC listener but I never liked James O'Brien much, even when he used to regale us frequently with how he proposed to his wife - his programme was always circular and all about him. My nephew who is a bit younger than him used to really like him in those days -similar interests, two daughters etc., but he can't listen to him anymore. He doesn't really aggravate me, he just really, really, truly bores me. He is a silly-billy and at times he even sounds like a Dennis Healey parody. He does not have a nice voice as said above. He has lost his way completely presumably because he was always a coasting lightweight and his attempts at being a shock jock just don't come off - he fills in with trying to sound as disgusting as he can get away with.
Nick Ferrari is OK in the morning. He is not the brightest knife in the box, but he moves things along quite quickly so you get a lot of the topics of the day brought to your attention. I used to like James Whale when he was on Drive time. Ian Collins was a good listen, lovely voice and quietly very funny but he has gone now also. Other than Nick Ferrari, I sometimes switch on Steve Allen if I wake up too early. Guaranteed to get me back to sleep in 10 minutes max.