Using 17 monitor makes you feel better when playing.Am I right ?It looks like you move faster,better reaction.
On the bigger 19 everything moves much slower,its like discomfort.
Have you ever tried using 17 at home , then went to LAN and played with 19 ?Didn't you feel any difference abouts this two types of monitor ?
Compare it.

i play on 19 LCD and its good to me. i dont want to change

yes but have you ever tried to play with 17 and 19 ?
im using 19,but i have brother who uses 17.always when i play on his pc 17 monitor i feel like i'm unbeatable.
You see,i want to say that playing with 19 is harded than 17:)

you say so ? ok lets take 15 and 21 ? how would you play cs with 21 ^^?
reactions drops by 25% at least

cause you dont see every corner,and with 15 its so comfortable

it's personal opinion, i play on 19"