All three of my protagonists are (human) warriors ... though Hawke doesn't really count since I had no interest in DA2 and didn't play it, which means I don't see her as "my" character at all.
I play humans because these games tend to be written very strongly for humans, so rolling with that tends to be best for my immersion -- both in terms of feeling connected to the plot and in terms of not feeling as if the game is constantly ignoring an aspect of my character.
I play warriors, specifically tanky sword & board types, because I just love the notion of being the first in and the last out, the one who leads from the front and draws the line in the sand, the true vanguard against the enemy. Hiding in the back doesn't appeal to me, and neither does being squishy. It just feels wrong when someone else is getting hit instead of my own character. Sadly, melee is rather annoying in this game ...
It's also a bit of a knee-jerk reaction to the "ZOMG mages are so special and superior and can do anything better than anyone else!" vibes I sometimes get from the setting and the fandom. Bringing down yet another magical threat or mage-supremacist as a despised "mere mundane" can be very satisfying.