I think that all reviewers offer great advice for their viewing audience, in terms of who they appeal to the most.
Cutlasssupremesl aka Brandon, I feel as though is a terrific reviewer because he does not care what people feel and he just says how he feels. A lot of my first bottles were because of his videos. Specifically D&G The One and Edition Blanche. He doesn't make as many videos, I guess he sorta loss the passion for it.
Fragrancefantic1 aka Al, is great. Though he doesn't do as many reviews I love his Street Scents because he gets the everyday common person (not a frag head) to give their take on a fragrance. He really and truly has a passion for fragrances and you can tell in his videos.
Toons1200 I enjoyed this guy though he is getting out of the game. Honesty and a disregard to what people feel about you goes a long way with me. The fact that despite all the frags he has his favorite is Midnight in Paris (my favorite as well), said a lot about him as a reviewer. I think people even commented on his video like Wow MiP favorite of all time are you serious.
FragranceBros are great and funny as hell, they keep me laughing on every video.
CoachRob619 is also great and I like the fact that he does cheapies.
Dracdoc is great as well, I like how he incorporates others opinions as well
Franchizzy is great. He has a laid back style, and seems like a real humble dude, his reviews are pretty accurate.
And Last of course is the Guru Robes08 aka Marc
I don't think much has to really be said about Marc and what he has done especially for the youtube fragrance community. I believe that his overseas trips for months on end, keeps him somewhat sane as it pertains to the fragrance game and reviewing without him getting burned out.
Nice starter list for the new guys out there.