What free Android emulator do YOU use on Windows for running F-Droid APKs?

What free Android emulator do *YOU* use on Windows for running F-Droid APKs?

In another thread, we found that nobody has ported a useful Android
open-source tool to Windows, where Andy Burns
suggested that Android emulation on Windows might work.
Is there an ad-free YouTube clone for Windows like NewPipe is for Android?
https://groups.google.com/forum/#!to...re/fLmXv99riaY

As many of us are ancient octogenarians, we've already tried almost every
emulator that ever existed by now - so - I simply ask one question here of
the people who *ALREADY* use Android emulation on Windows.

If you don't already use Android emulation, you probably won't be able to
answer the question I don't think.

However ...

If you do use Android emulation on Windows, what free emulator do you
recommend for running an F-Droid open-source tool such as New Pipe is?
https://f-droid.org/packages/org.schabi.newpipe/

(I will post the results of a RTFM in a followup but the question is not
what free emulators "exist" nor which are in the "top 10" lists - but which
free emulator *you* use that you like - and why).

The topic is:
What free Android emulator do *YOU* use on Windows for running F-Droid APKs?