I'd have to go with...sigh..Rappelz.
Rappelz just seems better made to me. The graphics, gameplay, pretty much everything.
I played luna for a few days, didn't have enough to keep me going. Might have been better with a friend but other than that..nothing.
And I loved Corum back in the day. That was my second mmo that kept me hooked for longer than 1-2 weeks (first being runescape). But what they say about being dead, not sure haven't played in forever.
If Corum was "alive" then I would definitely recommend it.





