Some may argue with me on this, but the shooting mechanics feel to me like LA fucking Noire, with more blood and upgraded animations.
It's not a complaint, but they sure as hell don't feel like Max Payne 3 however they're definitely better than GTA4.
LOL WHAT. Replay L.A. Noire duder, feels like a bad PS2 action game.
I'm not understanding the comments about GTA V's combat in this thread and others. GTA V has different movement and animation priority when compared to Max Payne 3, if GTA V controlled exactly like Max Payne 3 the game would feel extremely sluggish. The movement and speed in Max Payne 3 work perfectly in of itself.
The aiming and such is extremely similar. The biggest difference being there isn't a reticule on the screen at all times in GTA V, whereas in MP3 the reticule is always there. Running and gunning in V is insanely useful, I think it's getting a bad rep due to people not firing in bursts or firing in a semi automatic manner.
Knowing when and where to take cover, along with learning to pace your shots while running&gunning make combat extremely fun. The complaints about combat and flying seem to stem from people not seeing that there is a learning curve.