I used to play COD4 on 360 quite a while ago with DHDC but as you said i cba to pay for XBL anymore, which is a shame because i did used to enjoy it, I personally thought GTA4 online was pretty fun although did get boring kinda fast, i have actually just recently hooked my 360 back up, i decided to put it downstairs as it was in my way, i played skate 2 for a while but 360 is just not the same anymore
