I've played Ghosts, Madden, and 2K14. I got Lego: Marvel in the mail today, but haven't tried it out. Was thinking about maybe picking up Black Flag, but I think I'll hold off until a sale. If any CAGs want to add me on PSN, go ahead. I only have a couple friends on this right now. My PSN name is OrganizedChaos11.
I traded in Madden because it was mostly the same as the PS3 version. The menus were a lot quicker and not super laggy, but that's about the only nice thing I have to say about that game. I play more Madden every year than any other game and usually defend it as being not as bad as everyone says, but this year just isn't good and I hope they really improve it for next years game.
I think Ghosts is good so far. I haven't played the campaign at all, but the game looks a lot better than the PS3 version in my opinion. I'm having fun playing multiplayer, but COD multiplayer has its flaws like always.
I've only played a few games of 2K14 and I feel like I need to play more before I make a judgement. I think I'm frustrated with it right now because it doesn't play the same as the PS3 version and I'm just not used to it. The menus on the PS4 version are terrible and they changed The Association mode and are now calling it MyGM, but it's not exactly the same and the terrible menus are really bothering me when I'm trying to come up with trades and stuff like that. I will have to play it more before I decide on whether the gameplay is good, but I can safely say that the menus are terrible and changing The Association mode bothers me because that is pretty much the only mode I play in 2K.
Something else I wanted to get opinions on. I don't know if this has been discussed because I haven't been following this thread, but I think the battery life on the DS4 is pretty bad. I played for less than 2 hours on a full charge and already lost 1 out of 3 bars. I have a friend who is having the same issues.