Hare Krsna Dear Gurudev,

  Please accept my humble obeisances at your lotus feet.

  All glories to Srila Prabhupada.

  All glories to Guru parampara.

  Gurudev, stick to a specific temple seva/service is good or bad ?

  [I] mean, attachment to a specific temple is good or bad? or we should 

  open to serve anywhere/temple?

HpS - Queens of Dvaraka are attached to their palaces. That's what Krsna wants, no? Yet Narada Muni visits all the palaces, so it seem like different devotees have different service. For you it seems good to be attached to a certain temple now, but later you may become traveling preacher.

Your servant,

Girivaradhari-Gopal Das