I was originally taught to fly by two serving RAF pilots. Although they were totally different personalities and had very different flying experiences, the standard of instruction was remarkably consistent. I do not remember having any preference for flying with either of them, they were both great.
When I re-learned twenty years later at a competent flying club, the lack of consistency between the civilian instructors was a bit of a problem until I found one I liked and stuck with him.
I only ever had one problem with an RAF CFI and that was because he didn't seem to appreciate that, unlike the UAS students he was used to, we had to pay for our flying (and his) and he wasn't very sympathetic to the freedom we had become used to under previous CFI's.