XENOMORPH
When ur an Alien, please no tail spams, and no ganging on others unless they are teaming on u, but no 100 to 1 please, ok? And go all out and E kill all u want, but dont, i repeat DONT stealth kill (back grab) unless it really IS a STEALTH kill, as in you walk up behind them without them noticing and grab them before they notice that you are even there, but, if u get the chance to forward kill, as in you knock them down, or make them flinch, their already dead anyways :\
NEW RULE FOR ALIENS: Dont circle grab!! As in circling around someone until you can get an E grab in, DONT do it, its cheap

PREDATOR
Dont use ranged weapons on aliens unless your outnumbered, as in u vs 2 or more, but otherwise, dont shoot at them, its not nice, but go ahead and use combistick, as long as you throw just 1 for each target, thats actually a challenge to use, DONT SPAM ANYTHING, and again dont heavy spam (oh and BTW, only use like 2 mines at a time, cuz its possible to just have mines EVERYWHERE lol, that gets annoying for everyone but the predator, and its dishonorable)

MARINE
Comeon! You gotta try going off on ur own, marines are pretty cheap, hidin in huge groups with a buncha smartguns, I mean really??? Dont stay in groups of more than 3, its just kinda cheap to all stay huddled together in a hall or some corner.