Playing the game like monsters was fun for me as a break from the usual party makeup. We always had someone after us, trying to stop us from doing something. Our interrogation and torture tactics were the most fun part of the game sometimes. ...
It does make for a nice change. I have a character right now that's an NE sorcerer, who follows along with a larger group of good and neutral characters (three goody two-shoes plus a druid and a rogue) mostly because he is neurotic and cowardly.
Good fun.
Whilst it's possible for someone to play a chaotic evil character, I've never met anyone who could keep it up indefinitely. The temptation actually to interact in a productive way with friends around the table tends to moderate the alignment itself.
I think it raises interesting questions about whether it's necessary for chaotic evil to be unproductive. Evil has its own ends and if someone else around the table can further them, why not interact productively? I tend to think of chaotic (the alignment) changing its goals according to fleeting whims, but not necessarily fucking itself over by making everyone hate it until they murder it.
I have the same objection with the Chaotic Neutral alignment. People often characterise them as lunatics, gambling away everything on a whim and so forth. But why? All it means is that, a) one rejects legal frameworks,
i.e. is an anarchist, and b) that one has an ambiguous moral sense, choosing actions not because they are 'good'
per se, but for other (variable) reasons. I think that it is/would be a far more common alignment if the madhouse stereotype disappeared.
Anyroad, as for CE characters, I agree that there is no need for outright irrationality in playing one. Obviously Orcs are not going blindly to attack anything that moves! But it
is difficult to play them without an impulsive or anti-intellectual streak; when you combine a repudiation of law with a penchant for self-serving mayhem you end up with a rather unpredictable fellow! Productive interaction is certainly possible, but it's not all that likely to be long-lasting.
If chaotic evil were utterly unproductive, how could the Tanar'ri of the Abyss stand a fighting chance against the organized and disciplined devils of Baatar in the Blood War?
Oh, this seems like rather a different question! For myself, I always saw it more in terms of a higher 'birth-rate' (or whatever). The Baatezu are clever strategists, whereas the Tanar'ri rely on sheer numbers.