Looks like you really liked COP huh? Game has been out all week and the reviews have not poured in. I'm very curious to see what the sites are going to say about it. But nice to know a User seems to like it...a lot!
Let me recommend a few myself for all who might like to know. Your list have some great games, and I have darn near all of them. Let me see if I can't differentiate a bit. Some of these might seem odd and random, but they might just be fresh in my mind, I have a BIG back log of games to beat so there are some oldies but goodies that spring to mind.
Dementium The Ward - 85%
Moon 80%
(Small note on the above 2, I am not even really a FPS Fan, but I really liked both those games a lot)
Henry Hatsworth and the Puzzling Adventure - 88%
Professor Layton and the Curious Village - 95%
Professor Layton and the Diabolical Box - 95%
Nostalgia - 85% (A solid old style RPG. Don't let the lukewarm reviews throw you off it's scent)
Mega Max ZX - 92% (Found it used at a GameStop for like $8 and picked it up on a whim, thoroughly loved it, so much so that I hunted down the followup:)
Mega Man Zx Advent - 90%
Avalon Code - 85%
FF Crystal Chronicles Ring of Fates - 90%
FF Crystal Chronicles Echoes of Time - 92%
Dragon Quest IV - 95%
Dragon Quest V - 97%
I think I will stop there, before I list my entire collection. Let no one ever say the
DS doesn't have a lot of good games. I have a shelf full of
DS games I can use to argue with you. Ha ha.