See I played Eve Online for a few months but found it too restrictive (it's a PVP game not as open ended as they claim, try being a trader).
I occasionally do some COD online, but prefer playing it against my mate and godson on a weekend. Or having some mates round and doing split screen.
Unfortunately this is beginning to disappear in favour of some fairly poor generic online versions. Yet another COD anyone oh it's the same as before, what a surprise. I am being enticed by Battlefield 3, much bigger multiplayer maps, if you have to find a vehicle to go and look for someone to kill then thats a good map.