Is important to have 60fps or more in shooters? or 40fps is already very good?

30 FPS is about the edge of what we perceive as fluent or playable. 60 FPS is even better as it's twice the amount plus it also has to do with the Hz of your screen (google it, don't wanna do the math here). To be honest unless the game is old I basically play all my online games on the lowest possible detail level just so I can get more FPS.

TLDR: Not important, but ain't hurting.

30+ is fine, but games like Unreal need at least 50+...

I'm fine with 20-25 fps, and that's what I play most of my games in. Though, it wouldn't hurt if my silly little Intel HD 3000 wasn't a major piece of shit and could play games at 30 fps + at fullscreen resolution.

Depends on the person and their individual perception. Anything below 60 in any game is not enjoyable for me personally.

I used to care a lot about having 120hz and 125 fps on Quake 3 with OSP mod. But nowadays I am quite happy with my 27" led monitor and 60hz. Anything over 45~50 fps is good enough for me now. I can still see some "choppyness", but that really doesn't bother me for most games. Unless they are multiplayer fps type games :)

You can certainly do well enough with 30 fps on BF3 though. I used to get 30ish frames on that game, before I upgraded my gpu, and I could still get a decent kda, without any hard camping involved.

I don't like to go below 100 in TF2. Some Counter Strike players go up to 1k FPS.

Arma 3 plays good with 30fps, but bf3 with all the explosive stuff and action plays needs 40 min.

You will definitely see difference between 60fps and 40fps. 30fps is a minimum for game to run somewhat smooth but to enjoy it you really need atleast 60fps.

Since your question is about the effect on your gameplay and not on the game's appearance, then framerate isn't something for you to worry about overmuch. Human beings' reaction times don't get much faster than about a tenth of a second at best. As long as you're getting at least a steady 20 fps without lags or hiccoughs, then any delay should be small enough that your ability to react in time is still a much more significant factor than any delay in the display of new events in-game. Higher framerates will, of course, still appear smoother, more fluid, and generally prettier, although anything much higher than about 60 fps will yield diminishing returns.

I think human's eye can't see the difference above 60+fps. But there are games, where higher fps really matter. I play cod4 with 250 fps and it allows me to better control my aim, recoil, to jump higher, further etc. However, there in WarZ i got 20-30fps and it's kinda hard to play it in first person perspective, so I play in TPP and it's not so bad.

You'll notice the extra FPSs almost for sure (90%). But no, it won't improve your gaming performance in a noticeable way, as long as it's stable.

You can find lots of videos and articles. This is a fairly recent one. :)

Yes.

Though I will strike a balance between quality and 40-60 FPS if it's a stable 40-60.

War thunder 12 FPS with new card about 47 and it help me a lot

I usuallly set it to 58, cause 60 cause tearing

The more the better. If you have 60 then the experience is amazing, trust me :) 40 is still good but not as good as 60, obviously.

I usually play on 45 or above, perfectly playable, anything below is kinda choppy. 30 FPS is definitely unplayable in Multiplayer.

All Halos were 30 FPS.

I prefer to play on medium settings and have stable 60fps. I don't get these people who want to play on ultra and have like 30fps. That makes the game unplayable for me. It's like... Playing with frame limiter on GTA:SA lol

35 is ok.
I mean even movies have only 24 in europe und 25 in U.S.

its ok to watch a movie with 24 frames per secont so a game with 35 is already better than an ordinary movie.
going up the frames is always better but not a must.

Most people will be okay with 30+ FPS. It's people who want to be competitive that require 60+ FPS, but the difference isn't massive; it's a small edge, and competitive players like to take what small edges they can get.

More than 30 is good. Less than 30 you can see the interval between the frames

Read this for a laugh.

I actually enjoy playing a lot at 20~30 FPS...

I don't think having more fps will make a player better, anything above 35 is already good enough.