The best thing about Nutnfancy is his passion for his toys. Most youtube reviewers populate their videos with tons of "uhs", pauses, throat clearing, bad audio and general boredom. Nutnfancy's passion sets him apart from the crowd, and his passion is contagious. He is also a fine extemporaneous speaker. He has strong opinions, and confidently backs them up. That irritates some people.
He is also unusually self-important. I can deal with the blowhard aspect of his persona, but that's another thing that makes people hate him.
So, if you can deal with his overconfident, blowhard nature, then watch him. If not, then maybe look away.