I guess I'm more casual gamer than hardcore, but it's more like 50/50, because I like hardcore with my friends. I'm also more of a solo gamer, because I'm afraid to make a lot of mistakes in the team. I play in groups only when friends are invited, or when I drag them into the game myself.
I really like to go deep into the history and the plot of the game. Although it is now very difficult to find MMORPGs with a good storyline. And I would not say that I'm a fan of the roleplay, but I also like to think through the story of my character. To think over the in-depth story of your character is one of my favorite things.