Each and every person will have their own ideas about what works and what doesn't. The most important thing you can do is to remember that not one trainer will have the best way or the only way to do something. Regardless of how much better they claim their stuff is than the next guy, no rope halter in the world is worth $80 bucks. No one method is going to get your horse to "love" you.
If you want to learn from the NH masters that are truly
great, then you need to go back a few years to Ray Hunt and Tom and Bill Dorrance.
As far as the more modern NH clinicians go, my first choice would be Buck Brannaman followed by Clinton Anderson and then Dennis Reis and Craig Cameron. They are the ones that I've actually seen accomplish something with a horse that I would consider impressive and they seem to have the most straightforward and least deluded ideas out of the popular NH trainers.
Lots of people get all woozy over Pat Parelli, but his program strikes me as more of a circus act than actual horsemanship, plus, you have to spend like $15,000 just to get your horse to jump over a colored barrel and mug you for treats. And there is another guy that had a show on RFD-TV at one time that was a complete and utter idiot. His name was.......Ryan Gingrich. Oh, and a guy named Rick Gore that has about a thousand youboob videos...avoid him like the plague
What you'll need to do is just watch a bunch of stuff from other trainers as well; John Lyons, Chrix Cox, even Ken McNabb has some decent advice to offer. Absorb what you can from all of them. Remember what you think sounds like good advice and remember what you think sounds like silly advice. The parts you think sound good, give them a shot. Sometimes they work, other times they don't because they work on some horses and not on others. Absorb it all because there may come a day when you run into a horse that a certain method does
Get hands-on help every time you can, attend clinics when you can, and don't get too overcome by anyone in particular. I may love the methods of a certain trainer, but I can still say "Well, that's not the way I would do that" or "I know that method wouldn't work for my horse" or "Hey, that's cool, I know an easier way to get the same result". Always question whether the method seems right or not, always be willing to listen to and try other methods.
And remember, respect is the most important emotion that your horse can feel for you. Love, trust, and loyalty all stem from respect and you can have none of them without it.