Yeah, never really could get into Yggdra Union and KitN. I tried to find Riviera too. I was just looking for a new series, but when I found out that the Dept. Heaven series were only loosely connected, I figured trying to get through gameplay I didn't like wasn't worth it. Both games have just been sitting around collecting dust.
(And for some reason I have KitN on DS and PSP, so I'm thinking I forgot I even owned it at some point. o.O)