I like games that are challenging but not too challenging, it keeps things fresh and it allows me to think when I play games. I remember in the game Rise of The Triad, the final boss was difficult for me, I didn't know you were not supposed to attack him and that there was a different strategy. I don't like games that are frustrating or too easy. Games like Morrowind I found frustrating, they don't have map markers to destinations and you are supposed to take directions but despite that, the game was very enjoyable.