Trill definetly. Those spots down their whole Body. Love it!
Q.
I had a girlfriend who was into the Trill ... especially Jadzia Dax.
As for myself ... hmm ... well, if we're just restricting ourselves to aliens, then Seven of Nine does not apply, because she's human-born (just got Borgified later on and then has been progressively de-Borgorating).
T'Pol (the Vulcan in
Enterprise) wasn't bad ... B'Elanna Torres was pretty hot for a half-Klingon (and in the episode where we got to see her totally 100% Klingon, she was even hotter!) Ro Laren, the Bajoran in
Next Generation had a certain saucy look in her eye (particular in the episode where she shagged Riker).
However, the Borg Queen was pretty damn scary, she virtually raped Data in First Contact!
"Oooh ... was it good for you?"