As someone who started with Goldeneye and continued with classic 4p splitscreens like mario kart, halo, call of duty 2 and mw2
I can say with passion that watching all the screens is also making you a better player, as it increases your situational awareness, info gathering, multitasking and timing
Edit seeing as its an even playing field
"I think people should define the word crap" - Kirby007
Join the Prediction League http://www.vgchartz.com/predictions
Instead of seeking to convince others, we can be open to changing our own minds, and seek out information that contradicts our own steadfast point of view. Maybe it’ll turn out that those who disagree with you actually have a solid grasp of the facts. There’s a slight possibility that, after all, you’re the one who’s wrong.