I'm not happy with Daryll typing him to be an 8. In my opinion he is one of the most complex characters of the series and definitely a counter phobic 6. His sometimes rough overall appearance and behavior especially in the beginning of season 1 may let some people think he's an 8 but if you have a closer look at his motivations he seems to be an environment scanning, danger spotting and pretty much head fixated person. Also this ambivalent relationship to his brother, which is rather the person of authority for Daryll is a nice point. He is not that submissive like a phobic 6 would be but shares his point of view straightly. Furthermore he doesn't want to lead the group like Ric does (who is not a 6 in my opinion).
Great acting performance tho!