They do make good slaves...Jabba loves them.Twi'leks.
I'm not much of a fandom roleplayer in general, but Star Wars is an exception pretty much because I love playing as Twi'leks.
All of this, except swap rp as/against, too. I love size differences in rp.To RP as: Human (I know, boring. Booo!), cybernetically enhanced human, Goblin, Orc, Halfling, undead variants, and an OC l/g piggy anthro that I faceclaimed off of cyancapsule's Emelie.
To pair against: Ogres, Big Beasties: Horses and such, Centaurs, Minotaurs, Trolls, Big-bodied alien races... pretty much anything that alludes to considerable size difference, really.
Size Queen