Definitely wallbanging! I would like to see wallbanging taken from 1.6 and implemented in cs:go as can change the outcome of a match with one shot and by knowing how to do it. It is one of the most important parts of professional gaming. Wallbanging can add an entire new dimension to the game when implemented. One of the major reasons 1.6 is still played at many international events is that it has an extremely high skill ceiling, allowing for great competition. Wallbanging, I believe is a major component of that success. To ignore and abandon the '1.6 style' of wallbanging, will only serve to lower the skill ceiling further.

LOL wallbanging that all? ( the game play how you can go from ladder to ladder train to train object to object ) cs 1.6 has the best movement out.. you can strafe onto a ladder (de_train from shaq or snipertower to the train below if you are low hp you can do it with out hurting yourself landing on the ladder) :\ just wallbangs not the only thing they need to keep.