Charr were what caught my interest to start GW2. I saw some concept art while randomly surfing internet, the day before the pre-sale play went live. Thought they looked cool. Checked out site and bought game.
What I like the most about the design of the race is that they are the most unique in the game as far as not being molded or drawn from a archetypal fantasy fiction/mythological/ or historical background. To me that allows for a better game experience because you are seeing it for what it is and not comparing it to this or that.
In game to me their animations and moments look the best. Their capital is cool, kinda like the deathstar meets steampunk…lol. As others have said the amount of customization you can do when you roll your character is better IMO.
Lastly, I’m a human in real life, why would I want to play one in my spare time?