It seems like WOW is more on action, and EQ2 much more on
rpg-ing.
What i like about EQ2 is u can own a house, decorate it, and u can
do many other stuff not just combat. On the other hand, i dont like
it if the combat is too slow/troublesome. I need to try out the
interface and gameplay for both games.
I've tried Lineage2 before. The graphics are awesome, no doubt
about it, but the gameplay is a disappointment. I dont like the
controls/interface as well. 
I wish i can try WOW / EQ2 just for a while. If anyone has the
account, can pls loan me for awhile? I can return the account after
trying. Just wanna know how the interface / game play is like.