Thanks os2sam, I didn't saw this interesting topic. It reports the chinese "Discus Fish" is a major pool but it seems exclusive to China, so it's not detailed.
I already choose my pool, and I think I'm able to choose next pools by myself.
This post isn't for looking for advices, but ony for social-friendly sharing of personal experiences, not included in the linked topic.
P.S.: in the '80s I was developing on OS/2 :-)