lugum: Granted that is a long list, but yeah also a matter of personal taste.
Yeah, a lot of the DS's library worth mentioning appealed to me, so it turned out to be a pretty good handheld for me. Considering that only about 10-15% of the total library is worth mentioning at all, though, and the fact that those all pretty much appeal to the same audience, I could see why somebody might not like the library if the games just didn't appeal to someone.
lugum: Aren't the Pokemon games basically not the same game apart from some extra's and a new colour?
For the ones I grouped, I did so because they were the same game outside of what you can catch. For the separated ones (Black/silver/etc), I did so because they do include new mechanics, balancing, different regions to explore, different stories, etc. Yeah, the base gameplay is the same, though. For Conquest, that's more of an SRPG with Pokemon as your troops. There's also the Mystery Dungeon games, but I don't really like those.
lugum: There are some titles i never heard of, didn't even know ys had a ds release. Will check some out.
Honestly, for the Ys games, at this point, there isn't much of a reason to play them. When they were released, they were pretty much the only way to get a modern version of 1&2 in English. With the release of 1&2 on PSP and PC, though, they negate any reason to really own the DS version since those versions are better than the DS release. The base gameplay is the same, but you get better quality music, graphics, etc. in the other releases.