Keyboard and mouse of course.

Controller, especially DualShock, sucks for FPS's. I don't get some, with a mouse you literally point and shoot. What can be more convenient than that?

Controller everytime apart from twitch style games like quake or counter strike

Controller is 1000 times more comfortable to use for long play times and I don't notice getting owned every 2 seconds

Eh. I don't like it because it doesn't feel entirely predictable to me, and it feels like it's a cheap trick to try to make something that was never a great idea work.

KB/M

Not just for precision, but situational awareness is much better with it as well. That's the main reason why I play most non-FPS games with KB/M as well, though movement with gamepad is better.

The only input that will allow me to turn 90, 180, or any angle I desire, ~within a single frame.
Being able to look both left and right, and back to the center, before (or while) running down a corridor, that just cannot be done on a controller (not without sacrificing buttons and destroying any sense of immersion).

I find M+KB to be the easiest, most straightforward method to control a character outside of VR.
Unlike a VR controller, my mouse doesn't need to be held and swung around.
I am able to aim accurately with a mouse (and I am not going to hit anyone, or anything using it, so there is that too).

CoD is not a thing on PC, neither Battlefield. Look at the competitive e-sport scene for CoD and you'll find out that it's only played on consoles and it's tiny compared to the competitive scene of CS:GO or even Overwatch (PC) for example.

up until very recently i was a console guy and didn't like the idea of playing on pc
but recently since i bought a nice pc with a 1080 and i've made an almost total conversion and i'm just absolutely loving pc gaming because of the superior features like the higher framerates and free online
i still prefer to play with controllers though and fortunately gta 5 and destiny 2 which are my most played games have controller support by default

I've honestly yet to find a mass crowd of hackers in any given game. I ran across one cheater some years ago in a BFBC2 game, but outside of that there wasn't much for me to see in terms of actual "hackers". I did however run into two during my 360 days, when I was playing Fall of Cybertron. The two of them managed to hack the online character's, so they could swap out abilities and body parts on the fly (abilities that do not belong to certain classes, bodyparts included).

OT: M+K all the way.

I used to play with a gamepad for years, but it wasn't until 2012-2013 that I more or less transitioned from gamepad to M+K for FPS games. I still use a gamepad for other genres though.

The ban waves are working and putting cheaters under control. In one single ban wave they purged over 1 million cheaters out of PUBG. You talk as if they are doing nothing about the issue.

https://www.pcgamer.com/pubg-banned-over-1-million-players-in-january-new-anti-cheat-measures-block-reshade/

And the ban is not a simple game key ban where you can just buy another game key: It's a GPU ban, you won't be able to play PUBG again with unless you buy another GPU. Blizzard is also doing this with OW cheaters.

According PUBG corp. an average of 6000 players are banned every day. The cheater situation was very bad in the beginning until december 2017, but since january they put new auto-ban algos in the works that are more effective that the past ones, putting the situation under control.