You want to walk around when people are shooting at you?
As others have stated if you take time to get good then keyboard will not hamper you. As others have stated rocket jumping, etc. are all easy once you get the hang of them, and analogue is not more realistic IMHO as you turn, etc. as though embedded in treacle. With K&M you can whip around 180 like a real person and shoot the person running up to shoot you in the back... whereas with stick you sloooowllllyyyy turn while being shot.
Also I note the lack of aim assist with K&M while it is prevalent on consoles... I wonder why?
Because I like sitting in a big couch with a beer I'm playing more and more FPS on console these days... but the input (that's both movement and accuracy) is way behind K&M if you've taken time to play properly on a PC... which is why PC and us ex-PC FPS players will always defend it.
And in FPS accuracy sure counts for a lot more than movement anyway...
Try to be reasonable... its easier than you think...
