Anyone remember Joystiq? For a long time, I kept up with video game news through them, but I basically stopped caring about when they went down. Never found a site to scratch that same itch. Still instinctively went there as soon as I opened the browser for about a week.
From my early days, probably flash portals, like addicting games. Kongregate wasn't the same after GameStop bought them. I know Newgrounds is still alive and I still go there, but it's sad to see the traffic dwindle like it has (especially since Tom Full is one of my internet heros).