Frag rounds are the biggest reason they hate the shotguns. I don't use shotguns at all simply because I suck with them and the only map I like where it might work OK is Grand Bazzar. I don't like Metro because of my poor eye sight and Seine I dislike too. These are 2 maps I just get obliterated playing.
TOSHIBA Satellite Notebook
A-Series A8-3520M Quadcore APU
(1.6GHz 2.0 oc standard 2.5GHz 3.0 oc Turbo)
8GB GSkill DDR3 1333/ 640GB HDD
DVD SuperMulti/Window's 7 HP
15.6" AMD Radeon HD 6620g