Now I want to know about the Celtic style!!  I've studied a couple different healing modalities, and I've been told that some patterns I unwittingly use and methods I "developed" on my own (ha!) were Celtic.  
Ego? not so much.  I know best where to direct?  Nope.  I'm thinking I'm closer on the side of drawing down and letting it happen.  That is more how it feels.  I just had not heard/seen that description previously.  Makes a lot of sense to me.
And I think part of the advantage of a human "healer" is some folks need that channel for lack of belief that they themselves can heal.  I know I don't seem to work well on myself, but other healers are successful with me.  
Great topic, Gem!

There r lots of things like celtic? and more but nbefore outcome of ususi method nobody was aware of other systems,the system may have developed due to the different personalities which may b suitable for a particular type.A person may not be healed by ahealer may be healed by another why? [/b]

I have been a Usui Reiki master since the mid 90's.  I am a firm believer that we just don't make up types of Reiki.  We don't invent different types of Tai chi, it's an oriental art and that's that.  In fact, most of the people I know that are teaching Reiki have drifted so far off the path and added so much new age junk that I don't believe you get the same results.  Japanese Reiki relies on the same principles as accupuncture and infact the people had knowledge of it.  In Japan to this day it takes over 10 years to become a Reiki Master.  I realize we need to cut that time down some but I see people taking a 3 hour class and putting up a shingle saying Reiki Master.  If you invent your own form of healing and it truly works and has some scientific validation fine but don't call it Reiki.  Much like being a doctor, massage therapist etc.  There is "real" standard training for Reiki.  Then if you add a few ideas that work, ok.  
Blessings

SaqeRose is correct in identifying the issue that it takes a lot of time to be true master,just like a fresh doc. out of a college may bknown as a doc. and a practicing doc. from 20 years will also b known as doc,isn't it?This is regarding the name of a person practising an art or science.
      Now what i have learnt and i believe is that main stream of energy is only one, but because they are used for different purpose they r named differently.
   In case of Reiki and other healing methods similar to that and particulary from the east , all r connected with the Chi or prana whatever name given or method employed, the source is one.
   New developments in every field is appreciable,developments in a good way is mostly from the west, and i believe that any method which may stand to the test of time, will survivew others will vanish, why reiki is still there and to be faithful it's ever flourishing? because it has stood to the various tests and the people has seen ,felt and heard it's wonderful results.
-sheker

You're right Shekher about chi being chi.  I don't want to step on anyones toes here.  Chi can be used a lot of ways but because it is originally from an oriental culture, it's really good to learn their ways.  As for Reiki, I personally, would like to see Reiki stay an oriental art and not mix so many "new age" things with it.  I guess with all my years of experience in natural healing and being involved with psychic fairs doing aura photography, I just think some of the stuff people are inventing is money making (I only accept donations and do a lot of healing work for free) and I don't see a lot of experienced people.  By the way, we do get experience from working on others, and I don't have a problem with that.  I just get tired of seeing people take a day class and become a master with a shingle form $75.00 an hour.  I feel that way about anything.  A friend had a house painter who just decided he could lpaint houses, that was really a disaster. LOL!  Blessings to everyone on the path!