Most time consuming is hands down Warhawk.
Without glitching ( and glitchs were fixed way before trophies were added) it takes forever to reach General rank which is one of the gold trophies.
By forever I mean get 270k pts when a good player will average at best 150 pts/hour ( you won't do that at the start and past a certain pt ( 75k pts) you only play against others good players so no way to farm noobs..). So a good player will take around 1800 hours ( 75 played days)
And if you manage that you still have to get all medals which is far from being a piece of cake either...( and if you try to get them all while working on general which is what I would advise, you won't average 150pts/hour)....
PS3-Xbox360 gap : 1.5 millions and going up in PS3 favor !
PS3-Wii gap : 20 millions and going down !
