Too much time... I'm so sad!
Usually when I'm at home and not doing anything I'll have my laptop on, and I'll half be on the internet and half be watching TV.
I don't really think "I'll spend X amount of time here", I usually just read all the threads that I want to read, do some background checks, and then if it's the evening go on the IRC.
It still varies though, from no time at all a day (yes, it does happen sometimes!), to a few hours on weekdays. On weekends... that depends purely on what I'm doing, if I'm doing nothing then I'll probably be here a lot.
I have a firefox extension that tells me how much time a spend on certain sites, but I forgot to change "tbdl.org" to "adisc.org" so it hasn't been counting. I'll post again later and say how much time I've spent here in between posts...