I think, like Henry, that there are certain players who are in love with a particular concept, and they play that as much as they can... I am partial to the gnome illusionist concept, because I like how clever and creative I can be with the illusions. I also like giving depth to the gnome race. They get pidgeonholed by a lot of players by saying they are just pranksters, but I like to prove that they are more than that.
And I think it is dissapointing when our favorite concept is pushed aside by the game designers as less important than other concepts. We feel pushed aside as well. We even feel pushed aside by the community when others chime in and say that the game designers are right, those concepts are not as important as these other core concepts.
I am sure those who love Half-Orc, Bard, or Barbarian, Druid or even Psionicist concepts feel pushed aside as well.
But really, I think there comes a point where it really is good advice to just suck it up, try to find something we like from what we are being given, because you may just find something similar to what you want, or maybe even find something new to like. We can't just stew forever...