Whats up with people and Dunmer?
I think that has something to do with the abilities of Dunmer. According to the description from Morrowind
The dark-skinned, red-eyed Dunmer combine powerful intellect with strong and agile physiques, producing superior warriors and sorcerers. On the battlefield, Dunmer are noted for their skilled and balanced integration of the sword, the bow and destruction magic. In character, they are grim, aloof, and reserved, distrusting and disdainful of other races.
It makes sense to choose a dark elf since they are designed to be some kind of a general purpose race and with that it is always possible to create the most individual character.
I'm sure I will be a Dunmer too, although I'm thinking about to be a Nord.