Honestly if I was to have a girlfriend sense there are only a few female races like the eldar out there id go with the banshee just cuz they look badass and for other reasons.... farseers seem like the mean housewife no one wants to be around. haha
A Farseer, well both have there ups and downs. A Farseer can see what will happen in the relationship and a Banshee would just scream a lot.
Well a banshees scream is supposed to disorientate her enemies, so don't get her excited to see you or you will be dazed.
I wouldn't like the farseer only because she can see into the future so there really is no surprising her at all. so much for going to the movies for a date!
"Don't drink the milk!" Why? "It will expire in three days!" ( How I expect a Farseer girlfriend to be like.)
Well a Farseer can also be useful like "don't go outside you'll get cut in half by a khornate beserker."
I am not much of an eldar expert... Are those positions exists in Dark Eldar as well? My wife demands to know! Or is it one of the Chaos Gods?