I am giving Parelli a go with all three of my horses at the moment. With high school graduation, college classes, and work, it is really hard to find the time! I do not have any of Parelli's DVDs or anything, but I do have one of his older books and I watch and read all that I can about Natural Horsemanship online. :)
I started playing around with Parelli back in 2007 when my gelding Scotch (now 15 years old) developed a nasty biting problem due to my lack of leadership. Since I've never been very consistent with his training/playing, we don't even have all 7 of the games down. :( That sidepass game is killer...he so doesn't get it, and I'm not sure how to teach him. I don't think I am being assertive enough with my teaching--I really need to work on that or I'm going to get hurt. Again. :P
I believe Scotch is a LBI, but can quickly turn RBE if there is something scary. He is the boss of the herd, which can make working with him difficult. I really wish I had some pictures of me playing with Scotch, but here is a picture of him with Kubie:
Kubie is my 27 year old appaloosa gelding who I introduced to Parelli methods just a few weeks ago. He seems to be taking to them well. Since he was a therapeutic riding horse and used for kick and pull trail rides, he wasn't very responsive to riding aids. Since working with him on the ground (he can play the 7 games--sideways game only from the saddle though), he will respect my legs and aids better. He doesn't always like to stop right away (he likes to keep moving), so again, I need to be more assertive. From what I have observed, he seems to be like a LBE pretty consistently. (Yes, in the picture he is borrowing Scotch's halter...I only have one, lol).
I'm actually trying to sell my third gelding Patches, so I haven't been working with him as much as the other two. He can play most of the 7 games, but is just too much horse for me to handle. He is a RBE, which is hard for me to work with...I can be a nervous and jumpy person around horses, and I think we scare each other. 0.0