I had a Bose A20 headset when I started flying the CRJ200 and I wouldn't get rid of it. The cockpit isn't too noisy but the ANR makes it so much nicer. About 3% of the pilots I've seen take off their headset above FL180. Half of those pilots wear earplugs afterwards. Most jumpseaters don't wear a headset. Moving one ear cup off to the side makes for easy conversation with any jumpseater.
Most pilots I see are wearing David Clarks, because either they had a set already or they are using the David Clarks already on the plane provided by the company. Second most would be some version of Telex and then Bose.