Nice dodging there
Now let's compare two methods of the tabula rasa protagonist.
In Neverwinter Nights, you rarely have less than 5 options per dialogue node. As your character has no pre-defined personality, this leaves you quite a lot of room to form one for yourself.
In Deus Ex, you rarely even get a dialogue option, generally you only get one when your choice will directly impact gameplay (such as for purchases). As your character doesn't have much in the way of a personality, this leaves you with a blank, uninteresting avatar but also without much room to form one yourself.
In other words, not much room for self-expression.
Furthermore: What DDL said (the part you dodged).