I couldn't enjoy Yoshi's Island DS. The game plays out over both screens, and the gap between them really makes the whole thing confusing. It's not a particularly well-designed game in any regard.
You would like the Castlevania games, though. Dawn of Sorrow and Order of Ecclesia are the really good ones. Portrait of Ruin... eh, it was alright.
Yeah, I'm with you on Yoshi. I can't put my finger on exactly what I didn't like with it, but I guess it just felt souless? The first few worlds bored me to tears, then the game seemed to get better introducing new babies only to snatch them away in the final world(s)? I believe. There was a brief moment of fun, but for the most part I just got no enjoyment out of it. That extends to the soundtrack as well, just couldn't stand that either. Graphics seemed nice though, probably the one thing I did like about the game. Its certainly not a patch on the Snes Yoshi's Island that's for sure, not even close.
I did like Portrait of Ruin though, I really loved the final boss battle of that game (one of my favourites in the series), but for the experience I'd say Order of Ecclesia comes out on top. Its a great game in the first half before you
then you have a giant second half of the game which is even better than the first half. The inverted castle from SOTN is probably still my favourite second half of a CV game ever, but OoE comes very close.
One thing I did love about OoE against all other Metroidvania entries in the series was that it had a better base difficulty. It was much harder compared to the last few games right from the get go, which I liked because I felt the rest of the series was far too easy. I had to purposely use rubbish gear in SOTN just to give me some kind of challenge, especially against bosses (and that worked great, made the game way more fun).
Only thing I didn't like in OoE was the final boss. Felt like such a let down compared to the rest of the game, its a fairly by the numbers boss battle, not all that impressive compared to any of the previous games, probably one of the few things that PoR beats it on (in my opinion).