[adithyagenius]

Back in the days of q3 and hl there were so few keys that it wud fit in arrow keys , shift , ctrl and the 3 keys above arrow keys viz del end and pgdn. Anything extra would go to num0. But now with so many keys and all being needed in a firefight, it has become problematic. F.E.A.R had the slow mo and focussed aim. Also the flashlight needed to be nearby. Singleplayers are still manageable but multiplayer games like cs source even reload needs to be mapped to easily accessible key for the competitive advantage. There also needs to be key for crouching , running nearby.
Right handers got qerfcxz123 tab for all those keys. But they have a disadvantage because accientally hand might slip from wasd to esdf.
I generally keep
ctrl -crouch
shift - run
num0 - jump
end - flashlight
backspace - drop weapon
del-reload
scroll wheel - cycle weapons
arrow keys - movement
wasd - look up down left right
mouse buttons - primary and alternate fire.

Can anyone suggest me a good gaming mouse for large left hand ( I am 6'3" 90kg ; just so that you get an idea of my hand size) preferably with xtra programmable or sensitivity changing buttons on the right side of the mouse so that I can click them with my thumb. I cant spare more than 7k but preferably less than 5k.

@blackleapord92
ONI used to have such keys for left handers but I found that sometimes i accidentally move my hand to pl;' or ijkl keys in thick of a fight and would realise it after an expensive 3-5 seconds. Dont you have that problem

@rakesh14021983
Which microsoft mouse did you have? I used Comfort optical 3000 and it was awesome. Unfortunately the left mouse button isnt working well since last week and I am on a hunt for a better mouse. What exactly is clipping?