I've always found big Umbrellas to be too self-filling , on the other hand, in the studios we used to casually refer to huge light boxes as "Idiot Boxes" because they could be placed just about anywhere, by anyone and still give an ok shot. I like lights that give me more control. Lights that cast noticable shadows and can be used to define the shape of the subject. My personal preference runs towards smaller light boxes, hard lights and spots. Of course, everybody has their own needs and preferences.