Hey, I'm a bit late on this topic, but I'd like to share what I've played.
Try the 'Luminous Arc' series. Atlus only made upto 2 English, but its a good game with RPG-Strategy kind of gameplay.
For more serious galges, try 'Love Plus'. They've go English Patches going, but the 'Love Plus +' is a really big file (a whoppin 500+mb).
That's all I know for the DS.
For the PC, I recommend Clannad (Kyou made me cry), Fate/Stay Night (Waah...Saber), Shuffle! (Not really dramatic, though), Tsukihime (Arc...), and Da Capo (Just like Shuffle, isn't really dramatic).