I do not know if this will chime with anyone else's experience. I tend to be non-judgmental of people, unless they do something extraordinarily good or bad, and just take them as they are. However, if a third party passes a comment, such as, "She is snide", or, "He is really tight with his money", I then see everything that person does through the lens of the comment. I really resent that this happens, and much prefer having my non-judgment left intact.
I wouldn't like that kind of judgemental view impressed on me either.
Luckily I'm spared impressionable bit from the title, and I can tell you why. I'm just simply suprised every time that something like that is viewed as something bad, contemptuous, or good subject for a joke, etc. More often than not I answer with ''And what is wrong about that?''. Of course they won't admitt that a reason for them being biased like that is being racist, and there isn't a real reason, so they rarely respond with anything intelligible. But it happened few times they asked in return 'And what's your business about that?'', and often I had to add ''Because I'm like that too..''
though I can't say I'm non-judgemental myself, since there is few behaviours that will get only contempt from me if answer is extorted, and I'd rather not advertise it.
I had to google 'snide' 
