buttline,
I think how people view hours flown depends upon what work you are wanting to do.
Almost all my hours building towards my FI rating was in a R22, but I was going to instruct on the R22 and do my FI course on it too. It therefore made sense that the majority of my time was R22 time. As I recall, I found the FI course and early instruction very stretching and needed all the R22 experience I could get.
If you are to start instructing have as much time as you can get on what you are to instruct on.