Your Fav EL34 and why?

I am looking for some info on the EL34 tube and it's various makers, mostly current ones, but input on previous itterations of these tubes which fall into the NOS cat are quite welcome and would add some contrast.

I'm assuming like all tubes that the EL 34 tubes sonic sigs vary dependant upon manufacturer and era, as do so many other tube types.

What is your experience with this EL34 TYPE, and why did you select the one (s) you use now?

As always - Thanks so very much.