The recoil patterns are actually really hard to control and master and that's why CS has been so ever-present in eSports for the past decade, personally I find it easier to play another fps when you've been playing this series... a lot.
Ah, I set my guns on default. I even put stickers on them sometimes because they really fit into the classic look. I actually spent a few euros because a friend of mine couldn't stop buying skins and he's just so lame when he's playing... sigh. (DO NOT SPEND MONEY ON THE CASE OPENINGS IF YOU VALUE YOUR WALLET AND CREDIT CARD, they really suck.)
So in conclusion, everyone has their own tastes!