To me,i prefer Xbox 360 and their network for online gaming with consoles.I was never a fan of PSN.I´m a PC gamer,so to me,all the online plattforms for consoles are garbage ! It is like playing online back then,when modem 56k was relevant
(+ dont even have dedicated servers in the multiplayer games and wait way too long for connecting into games,laaaaaame
But if i use a console network,it is xbox live.Because you can barely play some games.But PSN is absoloutley crap.I checked it many times at a freinds place.The connection is bad (ok,i have to admit,it´s for free; so you cant expect too much),the controlling of the multiplayer features is bad.Even their kind of dashboard (dont know what the PS3 users call it) is very bad.So to me,there is really no point why i should choose PS3 to use for online sessions.
I know,there are fans,but maybe some of them will move to XBox 360 if things like that will happen more often