I like Nick Redfern's modesty. In one interview he explained that he also writes about pets and horseshows or whatever it takes to keep the money flowing. However he is a prolific author, a proven door knocking investigator and his knowledge of the scope of interdependant and interrelated field of study with the UFO at the centre is possibly unique.
In addition to being interesting his ability to reserve judgement and distance himself from belief frameworks is disciplined and keeps the investigative momentum going in a health manner.