Interesting characters have memorable strengths and weaknesses and in a game I would expect the mechanics to reflect them.
In fact, I'll go as far as to say that min-maxing your ability scores is fantastic for roleplaying and creating memorable characters, because it gives them both prominent strengths and weaknesses. Take Minsc, for example - the pinnacle of physical perfection with a hamster-sized brain.
First, let me say that I understand the desire to make a mechanically strong character. In fact, I almost always do. Of course, that said, I completely understand where Ixal is coming from. And I can see how min/maxing negatively impacts the enjoyment someone else gets from solely roleplaying.
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But regarding the quote above, I'd argue that min/maxed characters aren't exactly "memorable." The reason being is that they all pretty much look alike. These are typically carbon copy builds, or very close to. They're using the same dump stats; they're hiking up the same stats; they're using the same weapons and feats and charting out all the same progressions.
