-What type of content do you focus on? [PvE/PvP/Both]

Both.

-If PvE, what type of PvE? [Heroics/Raids/Other]

Raiding, hard modes.

-If PvP, what type of PvP? [Arenas, BGs, Rated BGs]

Arenas.

-What are your biggest quality-of-life issues? For instance, no longer requiring ammo could be considered a quality-of-life improvement for hunters.

Arms PvP:
Charge jumping.
Shield Wall, our one big defensive spell: not only is it on a 5 min cooldown for a measly 40% damage reduction, but it's also easily negated by disarm effects. It also absolutely kills any little offensive pressure you might've had going on, damage output during it is simply too low. (not being able to use it while disarm is also a major buzkill, and feels dated)
Intercept gone.
Spell reflect's cooldown nerf. Completely unnecessary. 25 seconds is overkill. Sitting in CC while you clearly have the spell reflect buff up is not cool either.
Increased damage taken during recklessness. The same problem as shield wall.. Why must we be penalized for every single cooldown we have? I understand this was "necessary" and somewhat balanced at some point in the past. But that's long gone. Classes and the game in general have evolved and that mechanic is just archaic. Some warrior mechanics feel as if they haven't been touched since beta/launch, and that's not good. (also easily dispellable)
Heroic leap not 100% reliable in some terrains (hello Twin Peaks).
Hamstring: weakest slow in the game.
Lack of self sufficient mobility in general.
Bladestorm, unless coupled with recklessness, hits for laughable amounts of damage.
Piercing Howl no longer breaking stealth even though it is not connected to Drums of War.

Fury PvE:
I am mostly pleased with the state of fury PvE right now with the exception of
Clunky and mediocre AoE after the whirlwind nerf.
Shouts on the global cooldown.
Rallying Cry's shared lockout with Last Stand.
Again, increased damage taken during recklessness.

-What makes playing your class more fun?

There's a lot more than meets the eye. It has great depth, and mastering the class has great perks in return. Also, the concept of rage.

-What makes playing your class less fun?

In PvP, being too dependant on dispels/etc to have any kind of mobility.
In PvE, still getting threat capped faster than one would like.

-How do you feel about your “rotation”? (Rotation is the accepted order in which abilities are used to maximum efficiency.)

I enjoy single target fury (TG) rotation. AoE feels clunky and does not put out enough damage.

-What’s on your wish list for your class?

Spell Reflect nerf reverted.
Intercept brough back, maybe sharing a cooldown with Heroic Leap.
Penalties on Recklessness (increased damage taken) and Shield Wall (turtling) gone.
Shouts off the global cooldown.
Reliable crowd control.
No more lowering the skillcap. Some changes like pummel in battle stance were clearly needed but others have turned warrior PvP into "tunnel the healer and do damage".

-What spells do you use the least?

Arms PvP:
Inner Rage, Sunder Armor.

Fury PvE:
Shattering Throw, Intimidating Shout, Disarm, Retaliation, Heroic Throw.