You dont say if you want RPG, Action, Strategy?
If you want RPG there are two games written by me you may like.
http://www.forlornonline.com <- It is a text based game, but you can literally spend thousands of hours doing stuff, from crafting, fighting, questing to piloting a ship across the ocean and sinking pirate vessels.
http://www.legendaryvoyage.com <- Graphical based, geared more towards people who like exploring and discovering new things in games. Interesting story and thousands of things to uncover.