The lovely thing about Reiki is that there are so many styles, so many different ways of working with the energy. Various people on the Internet have tried to compile lists of the different versions, and I think the total runs to a hundred or more.
Reiki seems to work as an effortless ‘carrier’, rather like a radio station and transmitter that you can play endless different songs through, but you need the underlying radio waves before the songs can be played.
Reiki is like those radio waves: a carrier that supports very many different ways of working.
Is it Karuna Reiki or Seichem, is it Reiki Tummo or Celtic Reiki or ‘Traditional Usui’ (in all its sub-flavours), is your song Jikiden or Raku Kei?
Or maybe it’s Rainbow Reiki or Lightarian Reiki, Violet Flame or Usui-do.
Some systems use a few different symbols, some use *loads* of symbols, some are structured, others are more ‘content free’; Reiki accommodates them all.
And it is true that some people will be attracted to a particular approach over another because everyone is different and one approach may feel more ‘right’ to one person than another.