Celebrim
Legend
Can you understand how that can seem, well, petty?
No, I can't. Because as other's have pointed out, who seems petty in this sort of argument is entirely subjective.
The DM provides you with 9 PC races, 14 different classes, 6 different ability scores to configure as you will with point buy, 40 different skills to choose from, and gives you a selection of 600 feats, traits, and disadvantages with which to customize your character - some of which change your character so much as to effectively be a different race or class. You can play characters with inspirations as diverse as Conan, Tarzan and Elastagirl. And you say to the DM, "This sucks. I can't find one character concept in all of this that interests me. I want to play a Giff."
Who is being petty?