Had several hours on BF4 last night, first time I've played both this game and any kind of FPS in a very very long time. Thoroughly enjoyed it. Plenty of busy servers. For a game almost 9 years old it still looks stunning too. I don't think this one will ever die.
I did like BF1 too, could never get into BF V at all, just didn't click with it.
I still play it on and off - BF4 was close to being the perfect BF game if they'd just put a bit more effort into certain areas and been a bit more inventive with the range of game modes and how the maps flowed gameplay wise.
Sadly I get too frustrated with "netcode" issues and other bugs and stop playing it each time after a couple of weeks or so.
random rock bringing you to a sudden halt for no reason
I never played 4 until this year skipped it and tbh mehh it was ok but thats it pretty much the same feelings I had in the beta when I decided to skip it
played 2142/bc2/bf3 to death