Hi! First post, I hope it's okay to bring a 2nd page thread back to live....
So far in my short experience with reiki, I've had a few things happening regarding "one's personal reiki style":
1) when you get a reiju, if you don't zone out or pass out, you remember the "feel" of it and can later emulate it, same color same taste.
2) when working actively/daily on yourself with a certain reiki style, "things" happen that change the feel of the energy... so it's a little bit less "Usui" and a little bit more "you".
3) your soul signature integrates itself into the style you've learned, and suggests a new form or activation method (ie. animal, symbol, whatever)
in my case, I suddenly HAD to use feathers instead of Ray or Light, eventhough I've had a big issue with Angelic fluffy stuff for years. After some time, I got over the feather thingy, and could comfortably use "light rays" again.
4) coming from a more "physical" Chi/ki background, where you have to spend hours/days/weeks gathering energy before hoping to try and cleanse yourself, I remember a period where I kind of lost sight of where my Chi stopped and where my Reiki started... no biggie, but a bit confusing.
I believe we are not "meant" to keep emulating the reiki frequency we learned from senior practitioners... if you feel your energies changing, towards something clear and "formatted"/"usable", I say go for it. Whether you choose to teach it to others though, is your choice. Just don't go all out, like so many people who think that "stronger is better". I got a weird attunement off ebay a few months ago (good stuff there if you follow your guts feelings), and ended up in a semi-trance in the middle of the night, feeling this energy rushing through me like a wild boar... very efficient in terms of "opening", but a little rough if you ask me. Still, for 7 bucks I can't complain.