#1 ->PEL<- Especially after the female liberation story arc.
#2 The Young Jem'Hadar Odo "raised" who went back to the Dominion
#3 TOSK. Any Tosk... but I'd prefer THE Tosk.
#4 Laas. Ashamed he was introduced so late in the series. He had an interesting point of view and it would have been cool to see if he managed to form a new alternative Great Link.