yeah, but I mean, how do people get even that amount of time from a videogame?
According to Steam, I have 511 hours of Skyrim in, and I haven't played it since mid-March. Some of that is having the game paused while getting a snack or something, but most of it is gameplay. It's replayability. And the fact that you can go pretty much anywhere. I played Dragon Age Origins, for instance, but you're limited in the areas you can explore, and you can't really ignore the quests. With ES, it's open world, so I just go exploring. And I don't feel the need to do everything with a single character. I had one char who was a Thief/DB member, another that was a warrior & did Companions, another that was a mage and did the College quests, etc. Vastly different playing experiences each time, because the characters and how they interacted with the world was so different.
If you're just talking about time, well, a couple hours after work during the week, and then lots of time on the weekends. It adds up.
Edit: Yes, I've seen at least one dragon in Markarth that I can remember.