I've been in a huge debate as of lately, and like the subject says that's it...
My main is a Horde Orc shaman, and I've wanted to continue either my Dreanei or Human Paladin, both around Lv 50...
Really, I've been look at these points
A. Racials
Dreanei - I enjoy GotN a lot, it saved my butt countless of times in PvE and PvP, and now that it is an instant cast, it really is great. Other then 1% hit, which is great when I'm the only one in a group, I don't see much else.
Humans - Have of course the PvP trinket, saves a trinket slot for PvP, but I'm debating if it would be better to just get the trinket in the end due to the high resilience it has. 10% Rep bonus is great, but truly dailys are something I do already, and since the rep grind is pretty easy now, I don't see it as strong as it used to. 5 Expertise is about 1% hit from my understanding. Perception is also a decent PvP buff, but most of the time when you end up finding the rogue they already started something. And spirit, well is useless.
B. Looks
Dreanei - I really love how they look in most sets and armor, the only thing I do not like about them is how they look on mounts, besides their own.
Human - Over all look great.
C. Lore
Dreanei - Personally, I love Unbroken, and the little lore that is with the Dreanei. I do not like they do not have no real new lore with WotLK though.
Human - Tirion Fordring is probably my favorite human characters, from the novel "For Blood and Honor", and I do love the story of Ashbringer.
(Sorry I brought this up from being posted probably thousands of times before, but any input would be grateful thanks.)