[quote=@Peridot]
I don't think I have a preferred house over another; it's the actions of it's current members that would make one seem more or less favourable over another. Slytherin gets a bad rap thanks to Voldemort and his followers (And I guess, it's founder) but some of the greatest witches and wizards came from Slytherin house. Merlin, for one! 

Oh, and if anyone is torn between putting their character in a certain house, I'll likely be allowing multiple characters. :D
[/quote]

True. The class of voldenort, Belatrix and others set its reputation in modern books.. 

Before that the last major dark wizard would be grimdalwwld. 
Durmstrang, I'd imagine that slytherin of that era would still have superiority complex, still be somewhat asshole, still be arrogant. Just not straight up evil. 

Durmstrang rep would be worse by far. 

Pure blood bias just less violent, more disdain than warfare. 

Also given 50's some other houses might carry a few traits in less dedicated and strong form as they do then in modern.