Anyways, I haven't been gaming since at least 2006-07-08ish since nothing after the PS2 generation excited me.
The sheer nostalgia and reading through No23 aka The Fog's DNAS thread made me register. In terms of PS2 online memories, I would have to say endless hours put into Socom 1, Socom 2, and Syphon Filter The Omega Strain as a teen during the high school days. I also rented Resident Evil outbreak a few times to play online, but I didn't have the hard drive for the PS2, which meant long load times to endure lol I still think those games are far more fun than what is considered fun nowadays.