Counter-Strike: Global Offensive specific rules:
Round time limit - 1:45
Freeze time limit - 0:15
Bomb Timer - 0:35
Round timer and the bomb timer should be 155 and 40 seconds respectively since these are the rules used in all online leagues and competitive tournaments since an update made a few months ago by Valve.
The times listed are the old standard competitive times.
Based on personal preference the map pick system is pretty random and I would prefer a pick ban system. Would also prefer Bo3 finals but I understand there might be time constraints.