Can some tell me which server is gonna be full PVP, Yin or Tao? Or are they combination of pvp/pve as always?
They are both combination. In my opinion, if you want PVE, go to Tao. If you like pvp and want a chance to be competitive without spending several thousand dollars, come to Yin.
Depends what type of server you prefer (PVP/PVE), however overall I think Yin will be better as you are starting new with everyone else. People on Tao are already geared.