Worf began the series as a general relief officer. Honestly, Roddenberry did not want him on the show at all, but he got tired of people asking to see Klingons in the 24th century. Based on the Tasha Yar thread I did, I have grown interested (for comedic reasons) in such things as Chief Engineer Worf firing the warp core at any nearby alien vessel. So how would Worf fare and operate in any other position on the Enterprise-D besides Tactical?