Which call of duty do you like best online?

I want to get a call of duty part on playstation 4, I just don't know which one.

First and foremost, I want to play online, what are the differences between the different parts online, or are they all more or less the same?

At that time I played a cod part on the playstation 3, unfortunately I don't remember which one.

On the map map, in Team Deathmatch for example, the opponent was briefly displayed when he shot, I liked that very much, is that the case with every call of duty?

Black Ops = sweaty

everything else = camp camp camp

Thanks, on camp camp camp I don't feel like it, sometimes with a fat steak and a shotgun in the corner xD

Boots on the ground (immobile / realistic) - the new modern warfare (not the 2017)

otherwise black ops 4 - but is full of tryharder