Well I suppose my practice is very different to many of those here, being firmly Western Reiki complete with all the bits and bobs that don't make up most people's idea of Usui Reiki!
But here's my experience for what it's worth.
Reiki found me when I was ready to find Reiki. My parents were both dead and I owed them nothing: I didn't have to maintain any formal Christian identity, for example, to please my mother, nor did I have to eschew any spirituality to please my father (growing up in that house was, shall we say, character-forming!).
I had been a spiritual healer when I was a child. Then, due to various factors, I turned and ran from anything to do with spirituality. The first thing Reiki did was bring me back to my own spirituality, my own heritage as a healer, as a Christian, as a spiritualist, as someone who may have been a witch in a past life.
Then Reiki got to work on my situation. I have been ill most of my life with various inherited disorders, and one in particular had never been properly diagnosed. Within 6 weeks of my Level 2 attunement I'd visited a specialist, received a diagnosis, and all the help the UK state could provide me with.
Then Reiki got to work on the disorders themselves. I became so physically well that I was able to complete an intensive one-year training course on aromatherapy, reflexology, Indian head massage and Swedish massage. Now there are days when I don't take any medication at all - 5 years ago I was taking 6 - 8 tablets a day for various things.
While all this was happening I suppose my mental state was changing, and still is. From being a born and hereditary worrier, I've changed the way I look at my life now. I have a situation which I worried about for 30 years, and which I now find I'm living through - and "just for today, do not worry" helps me with it every day. This situation is being healed now, as is my attitude towards it.
For me, honouring my teachers doesn't just mean Usui/Hayashi/Takata: for reasons hinted at above, my teachers are from many different religions, systems of belief, philosophies. They all come together in me and I have no compunction in celebrating their spiritual cookery (I'm a bit like a spiritual casserole I guess!)
I used to have a real temper but "just for today do not anger" keeps me on an even keel.
Reiki, however, is more than just a meditation I do at the end of each day. It's a consideration, a mindset, a usage. My old Sunday School teacher used to tell me "some people are so heavenly minded they're no earthly good", and I try to strike a balance between spirituality and practicality.
Do you know, I'm perhaps the luckiest person I know. I have a lifestyle my mother would have died for: a man who thinks the world of me and is my best friend: and a purpose to my life. I am most richly blessed.