For me, it's about a lot of things.
Mainly, it's about finding people who I can talk about Pokemon with - I never had much of that til recently, my housemate also likes Pokemon, before that, I never really knew anyone who likes Pokemon.
And here, I can meet with lots of peeps, have a laugh, and make new friends. Seriously, it's perhaps one of the friendliest forums I've seen in a long while (and I'm an old git, so I've seen quite a few ;-) ) and you can talk to anyone about stuff and get a nice friendly reply in return.
Besides, I've been needing something to do around 12 am - 5 am when I can't sleep, so I've got PC in one window so I can post something if I want to (and I get bored being up that late, so I post quite a bit). Considering for most of you US people, that's around your evening time, I'm usually on when it's busiest, meaning a lot to read/reply to.
Oh yeah, and for the CaRtOON lady as well. I am her protector, her bodyguard. :-) If I go away, no-one's there to protect her, so that's my job to be around.