My first phone is Nokia 5310, it's a beautiful and light phone, I still like it. It's a Symbian S40 system phone, the game impressed me most is Vampires Dawn: Deceit of Heretics, it's an RPG game. It has fun game plots and classic RPG fight. Darkest Fear and Silent Hill are also fun mobile horror games.
But I don't think there are more fun mobile games that smartphones have than Symbian phones have. Are they just make multiplay mobile games nowadays?