I thought this was going to be based on Gamlen saying Hawke has a thing for elves. I reckon most people's Hawkes have an elf fetish. I mean, it's hard not to:
You romance Fenris, Hawke probably has an elf fetish.
You romance Merrill, Hawke probably has an elf fetish.
You kiss Tallis, Hawke probably has an elf fetish.
You romance Isabela and join her and Zevran, Hawke probably has an elf fetish.
Honey badger must have an elf fetish.
My Honey badger had an elf fetish. Well, a crazy fetish... and Kirkwall isn't short of crazies.
I only got Gamlen's line twice, yet 3 of my 4 Hawkes romanced an elf. Although, one (Honey badger) romanced Tallis (also Anders). You get the line in Act 3, right? I always do MotA in Act 2.
Actually, is it possible for Hawke to have a dwarf fetish? You can't flirt with Varric, can you? It's been a while since I played DA2, so I don't remember.