In agreement, there is a lot about Wow to hate and IMO a lot of it is player base. Have you ever been on DDO at the times when Wow is down and they come over here... its not pretty >_>
On the origonal topic:
Have you ever been running through a dungeon with a group of people and you look behind you to notice one person has decided to exp sponge without contribution? Just standing there, afk and loving the exp they rake in for doing nothing.
On this topic I would love the ability to in dungeon boot. I have had repeated instances where the rogue does not know he should have been putting his skill points into disable device and he has a skill modifier of +5. (aweful rogue, even if he is assassination) Or my personal favorite. The cleric or favored soul who is more content to swing his weapon around and watch the party die after he joined on, agreeing to heal. (I will concede there are battle clerics and FvS out there, but when I specifically ask you to heal before I accept your request to join, and you say you will do it, I expect you to make an effort with even a 'cure light wounds' now and then
)
I am in favor of seeing what others wear in the way of gear. If somone decides to flame you let me remind that there is this lovely function that helps you keep that from happening. Ignore list
Here is one that I would concede is a minor nit pick. A try before you buy (from the AH) function. How many times have you purchased a suit of armor only to have it come out looking like purple PJs? When given a choice to buy, dont you think it is fair to you to pick the shield that most fits your style? Or the Armor that has the most spikes, should you want it? Or my personal favorite, pick a armor color that is as far from, and I quote: "Looking like a unicorn puked on it." (courtesy of Zeroex Five)
So to Rehash what I personally wouldnt mind:
1) a Mid run boot, or afk timer to get rid of pesky pikers2) A preview function on the AH
A side note, all the posts in here giving suggestions have been great, I look forewards to seeing what else people have had gripes over :P