I don't really play games over and over, there are too many games around to play. Gothic 3 is probably the game I started new the most.
If you count repetitive online games my guilty pleasure is RL. I thought I would get bored by it within a year. Well 2 years and 1500+h passed and I'm still not sick of it.
If you demand respect or gratitude for your volunteer work, you're doing volunteering wrong.