Charr Warrior with Longbow and Rifle. Sounds weird but it's due to a combination of things:
I always played Ranger in GW1, Incendiary Arrow is one of my favorite skills. But the bow skills the Ranger gets in GW2 are all so plain, they're all variations on shooting an arrow. The shortbow gets Poison Spray, but for the rest it's all regular arrows.
And then there's the fact that you have to use pets or you're at a disadvantage. The Ranger in GW2 just isn't for me.
The Warrior's Longbow skills on the other hand are awesome. Tons of AoE attacks, most of them dealing fire damage or exploding. Instead of a pet I get another skill (Burst skill) to use. I get Pin Down to keep my enemies at a distance, get a few utility skills to knock them back, and even then I still have enough health and armor to take hits too! The Warrior just fits more with how I'll play.
At first I was kind of disappointed that I couldn't be a ranger, but had to be some kind of freak, a tank doing ranged damage.
But then I realized that there's nothing wrong with using weapons that don't "fit" with your class:
In GW2 a class is effective with any weapon it can equip. It's an inherent part of the way weapons change your first 5 skills depending on the class that wields it. An elementalist using daggers isn't worse at it than a thief because an elementalist uses it totally different. He doesn't use it to cut, he conjures short range spells with it. The game is balanced around this. There's no "DERP YOU'RE A NECRO USING AXE AND FOCUS LOL NUB YOU SUCK", because if a Necro can use those weapons, it's supposed to be viable too.
That was the point where I realized how genious this system really is.
Weapons aren't weapons, they're "skill build containers". There's no reason a Warrior with a bow is worse than a Ranger with a bow (just different). More focused on AoE instead of long range attacks.
The only problem is that the Warrior with longbow gets mostly AoE attacks. My solution is to also use the rifle, which allows me to still stay at a distance (even having a cripple skill too), but deal a ton of single target damage.
Finally, the Warrior allows me to even switch to other weapons I want to use, to switch it up in case bow/rifle gets boring. I'd use greatswords, dual wield Fiery Dragon Swords or dual wield axes. All weapons I wanted to use, and I don't need to roll another character to do that, I can just keep playing a single character.
My alt will probably be a Sylvari/Charr Elementalist wielding two daggers (which get amazing skills too; heavy damage close range attacks like Lightning Whip and Vapor Blade).