3rd person cuz u can see wats around you like in battlefront 1942 u can see the mines and wats arond you instead of looking at the ground and getting shot
There is a middle ground. I prefer the newer games where you can switch between the two. I loved the way you could do that in Metal Gear Solid Subsistence and Guns of the Patriots.
1st person cause it looks like your the one looking at whats coming at you, unlike 3rd person u can see ur own person and its not really that much entertaining