Farlander said:
As far as I understand, the Sith eyes appeared for Darth Maul as means to make him cool and menacing (I wouldn't call Palpatine's eyes in RotJ Sith eyes... they're relatively normal). Then, in 2003-2004 (AFTER AotC, mind you) KotOR games have been released, where those who follow the Dark Side slowly change appearance (most notably the eyes).
Nah.. he is cool even without the sith eyes ;)
The concept can work
-Angel