Second job!
To me, PC is mainly a nostalgia-fest. I probably spent more time on PC in my formative teenage years than any other website (and probably longer than I saw some of my friends). Because of this, it had a big impact on me growing up. I'd wake up, check PC, go to school (and still find a way to check it), come back, and be on PC until I needed to do something important in real life. Although, saying that, PC WAS my real life for all intents and purposes, and what should have been real was really a 'distraction' from this place.
Nowadays that's pretty much reversed. As much as PC means to me, it's definitely not the centre of my life any more. In terms of most visited sites, it probably squeaks into my top 10, but it's definitely in the lower limit. Modding is fun, but it's a distraction from my definitely real life.