Are personalities a bad thing to have?

Ummm, K. Simple (irresistible) counterpoint.

It's impossible to get rid of personality.

So you're kind of saying it'd be nice if we could all stop taking shits, cause they smell like death, don't they, so wouldn't it be nice if we didn't bother? We simply can't do anything about it.

Why? Um, I'll explain briefly, but take the spirit and not the letter of the arguments to question. Your personality is defined by the choices you make, and against the standard of everyone else, right? In order to get rid of personality, your system must have specific answers for every possible choice in order to eliminate personal interpretation. That's impossible, so your personal interpretation must come in. It is in those decisions that we begin to differ from each other, based on what we believe to be important facts to include, how clever we are, what we genetically predisposed to like and not like etc. And in the same way no two people are alike, no two people will consistently make the same choices in a situation where there is no heuristic to select. e.g. favorite color, word choice, ability-based choices in what professions to get interested in, hormonally-influenced mood-based choices, etc. And these sorts of random (and intentional, for that matter) choices, and the patterns and non-patterns that they fall into make up our personalities.

I'd even take up issue with the idea that personalities are bad things to have, but one need first have it that it is even a possibility to contemplate, which I don't believe to be the case.

Jam it back in, in the dark.