It's really a process of elimination.

1. I'm just not interested in the short races. There's a reason hobbits were unlikely heroes in the Lord of the Rings. I think trying to force them into the role of warriors and knights is antithetical to immersion. They should be running away from trouble, not directly into it.
2. Dragonborn look nice, but I can't imagine romancing someone as a dragonborn. They can't so much as kiss someone realistically so that's a whole aspect of the game that suffers for me.
3. I have the same issue with half-orcs. They're monsters with tusks coming out of their mouths. This monster isn't going to settle down one day with Shadowheart. That's just not the way the world works.
4. Tieflings don't work for me because of the refugees from the grove. I'd want to play into the devilish nature of the tiefling, but the tieflings in the grove are all so far removed from that. It ruins it.
5. A githyanki would be fine except Lae'zel sort of steals the show with all the attention from Vlaakith and Voss.
6. I could almost play an elf or drow but I always get turned off by the effeminate movements built into the races.
7. Humans would be great. Except all the male faces are bad, imo. I really have no interest in a character with any of those faces. And the idea of playing a female is weird to me. I don't get it when guys play females.

Which leaves half-elves.